Low temperature crushing microwave sterilization system

Abstract

The present invention provides a low-temperature crushing microwave sterilization system, including: a two-stage crushing and freezing component, an energy recovery component and a microwave sterilization component; the two-stage crushing and freezing component is used to coarsely crush the material to be processed first, then gradually cool and freeze it, and then crush it at low temperature; the energy recovery component includes a rewarming subcomponent and a cooling subcomponent, the rewarming subcomponent is used to perform multi-stage heating and rewarming on the low-temperature material to be processed output by the two-stage crushing and freezing component, the rewarmed material to be processed enters the microwave sterilization component, the material to be processed moves spirally in the microwave sterilization component and is microwave sterilized; the cooling subsystem is used to cool the microwave sterilization component using the cold energy of the low-temperature material to be processed output by the rewarming subcomponent. The low-temperature crushing microwave sterilization system of the present invention is first coarsely crushed and then crushed at low temperature, the particle size of the material after low-temperature crushing is finer and more uniform, solves the hidden danger of material jamming and blocking during normal temperature spiral conveying, and reduces operating costs through energy recovery and cascade utilization.

Description

Technical Field

[0001] The invention relates to the technical field of pulverizing and sterilizing, and in particular to a low-temperature pulverizing and microwave sterilizing system. Background Art

[0002] In recent years, the medical industry has developed rapidly, but medical waste has also increased day by day, bringing serious problems to the environment we live in. Medical waste comes from a wide range of sources and carries a large number of bacteria and viruses. If it is not properly handled, it may cause social diseases. Large medical institutions and some small medical units will generate a large amount of medical waste in prevention and medical work. In addition to waste generated by medical institutions, many pharmaceutical factories will also generate a large amount of medical waste, mainly drug residues with viruses and bacteria and some pharmaceutical semi-finished products such as bacterial residues, various antibiotic residues, and discarded activated carbon sulfuric acid residues.

[0003] Medical waste refers to some contaminated waste generated by hospitals that has come into contact with the blood or flesh of patients, such as waste water, syringes, cotton balls, etc. used by patients. These medical wastes are infectious and toxic wastes generated by medical institutions in the process of medical treatment and prevention. Medical waste includes discarded products with potential infectiousness or other hazards generated in the field of medical treatment and prevention. The "National List of Hazardous Wastes" divides medical waste into five categories, namely infection, injury, medicine, chemical toxicity and pathology. The large number of pathogens and bacteria carried by them can be transmitted through the air or contact. Some medical wastes are not only polluting, but also highly radioactive. If they are not properly handled, they will pollute environmental resources and affect human health. With the improvement of people's health awareness and social medical conditions in my country, the per capita medical resources have increased significantly. How to deal with medical waste has become an issue that needs to be widely paid attention to by relevant departments and society.

[0004] There are many methods for medical waste treatment at present, such as non-incineration methods such as high-temperature steam treatment, chemical treatment, microwave treatment, as well as incineration, high-fraction decomposition, drying and sterilization. Among them, the high-temperature steam treatment method cannot reduce the volume and amount of waste, and will cause weight gain due to the condensation of steam, which is costly; the incineration method is prone to secondary pollution when some waste is incinerated (such as plastic incineration will produce highly toxic carcinogens such as dioxins), and further treatment requires the installation of tail gas treatment facilities, which increases costs; the high-temperature pyrolysis method will produce a certain amount of tar during the high-temperature pyrolysis process, which is easy to block the pipeline of the pyrolysis furnace, increasing the difficulty of cleaning the pipeline; the magnetization cracking method has high difficulty in processing facilities, complex equipment, and high cost. Summary of the invention

[0005] The present invention provides a low-temperature pulverizing microwave sterilization system, which is used to solve the problem that the centralized incineration disposal method of traditional Chinese medicine waste in the prior art is not suitable for emergency epidemic prevention and is prone to secondary pollution.

[0006] The present invention provides a low-temperature crushing microwave sterilization system, comprising: a double-stage crushing and freezing component, an energy recovery and utilization component, and a microwave sterilization component;

[0007] The double-stage crushing and freezing component is used for coarsely crushing the material to be processed, then gradually cooling and freezing it, and finally crushing it at low temperature; the energy recovery and utilization component includes a rewarming subcomponent and a cooling subcomponent, the rewarming subcomponent is used for multi-stage heating and rewarming of the low-temperature material to be processed output by the double-stage crushing and freezing component, the rewarmed material to be processed enters the microwave sterilization component, the material to be processed moves spirally in the microwave sterilization component and is microwave sterilized; the cooling subsystem is used for cooling the microwave sterilization component by using the cold energy of the low-temperature material to be processed output by the rewarming subcomponent.

[0008] According to a low-temperature crushing microwave sterilization system provided by the present invention, the two-stage crushing and freezing component includes a coarse-effect crusher, a precooler, a freezer and a low-temperature crusher connected in sequence, the rewarming subassembly includes a separator, a low-temperature regenerator and a high-temperature regenerator connected in sequence, and the low-temperature crusher is connected to the separator; the microwave sterilization component includes a conveyor;

[0009] The separator uses the exhaust gas from the precooler to preheat the material to be processed from the low-temperature pulverizer; the low-temperature regenerator uses the normal-temperature exhaust gas from the coarse-effect crusher to heat the material to be processed from the separator; and the high-temperature regenerator uses the high-temperature steam inside the conveyor to heat the material to be processed again.

[0010] According to a low-temperature pulverizing microwave sterilization system provided by the present invention, the low-temperature gas outlet of the freezer is connected to the low-temperature gas inlet of the precooler.

[0011] According to a low-temperature pulverizing microwave sterilization system provided by the present invention, the cooling subassembly includes a cooling fan and electronic control components, and the microwave sterilization assembly includes a microwave generator; the low-temperature gas in the low-temperature regenerator cools the electronic control components and the microwave generator after passing through the cooling fan.

[0012] According to a low-temperature crushing microwave sterilization system provided by the present invention, the coarse-effect crusher is arranged above the precooler, the outlet of the precooler for processed materials is connected to the inlet of the freezer for processed materials, the low-temperature crusher is arranged below the freezer and not lower than the separator, the separator is arranged above the low-temperature regenerator, the outlet of the low-temperature regenerator for processed materials is connected to the inlet of the high-temperature regenerator for processed materials, the outlet of the high-temperature regenerator for processed materials is connected to the conveyor, and the conveyor is arranged at the bottom layer.

[0013] According to a low-temperature crushing microwave sterilization system provided by the present invention, the low-temperature crushing microwave sterilization system also includes an ultra-low temperature refrigeration component. The low-temperature gas output by the separator enters the ultra-low temperature refrigeration component. The ultra-low temperature refrigeration component provides an ultra-low temperature cold source for the freezer to deeply cool the pre-cooled material to be processed.

[0014] According to a low-temperature pulverizing microwave sterilization system provided by the present invention, the low-temperature pulverizing microwave sterilization system also includes an exhaust gas purification component, and the exhaust gas purification component is connected to the exhaust gas outlet of the low-temperature regenerator and the exhaust gas outlet of the high-temperature regenerator.

[0015] According to a low-temperature pulverizing microwave sterilization system provided by the present invention, the exhaust gas purification component includes an induced draft fan filter, a radiator, a gas purification component and an induced draft fan connected in sequence, and the refrigerant branch of the ultra-low temperature refrigeration component flows through the radiator to absorb exhaust heat.

[0016] According to a low-temperature pulverizing microwave sterilization system provided by the present invention, the microwave sterilization component includes a humidifier, and the humidifier is used to perform secondary sterilization and heating and humidification on the materials to be fed onto the conveyor.

[0017] According to a low-temperature pulverizing microwave sterilization system provided by the present invention, the low-temperature pulverizing microwave sterilization system further comprises a controller, the low-temperature pulverizer is provided with a pulverizer temperature sensor, the separator is provided with a separator temperature sensor, the humidifier is connected with a humidifier temperature sensor and a humidifier humidity sensor; the pulverizer temperature sensor, the separator temperature sensor, the humidifier temperature sensor and the humidifier humidity sensor are all connected to the controller;

[0018] A low-temperature fluid circulation regulating valve is provided between the low-temperature fluid outlet of the precooler and the separator, and a humidification regulating valve is provided at the water inlet of the humidifier; the low-temperature fluid circulation regulating valve and the humidification regulating valve are both connected to the controller.

[0019] The low-temperature crushing and microwave sterilization system provided by the present invention is that the materials to be processed are first roughly crushed in the two-stage crushing and freezing component, then gradually cooled and frozen, and then crushed at low temperature. The crushed low-temperature materials to be processed enter the energy recovery and utilization component, and the materials to be processed after multi-stage heating and rewarming enter the microwave sterilization component, and are sterilized in a microwave environment. The bacteria and pathogens in the materials to be processed are destroyed by microwaves to achieve the purpose of sterilization, and the crushing, rewarming, and sterilization process of the materials to be processed are completed. The energy recovery and utilization component includes a rewarming subcomponent and a cooling subcomponent. The rewarming subsystem performs multi-stage heating and rewarming on the low-temperature materials to be processed from the two-stage crushing and freezing component. The rewarmed materials to be processed enter the microwave sterilization component, spirally move in the microwave sterilization component and sterilize by microwaves. The cooling subcomponent uses the cold energy of the low-temperature materials to be processed from the rewarming subcomponent to cool the microwave source. The low-temperature crushing and microwave sterilization system of the present invention is first roughly crushed and then crushed at low temperature. After the low-temperature crushing, the particle size of the materials is finer and more uniform, which solves the hidden dangers of material jamming and blocking during normal temperature spiral conveying, and reduces the operating cost through energy recovery and cascade utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the low-temperature crushing microwave sterilization system provided by the present invention;

[0022] Figure 2 It is a schematic diagram of the installation structure of the low-temperature pulverizing microwave sterilization system provided by the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the ultra-low temperature refrigeration assembly provided by the present invention;

[0024] Reference numerals:

[0025] 1: Radiator; 2: Ultra-low temperature evaporator; 3: Low-level compressor;

[0026] 4: Advanced compressor; 5: Air cooler; 6: Flash tank;

[0027] 7: Elevator; 8: First primary and secondary filter; 9: Cooling fan;

[0028] 10: water storage tank; 11: precooler; 12: coarse crusher;

[0029] 13: Low temperature pulverizer; 14: Low temperature regenerator; 15: Freezer;

[0030] 16: high temperature regenerator; 17: microwave generator; 18: conveyor;

[0031] 19: Spray nozzle; 20: Electric fresh air valve; 21: induced draft fan filter;

[0032] 23: Gas purification component; 24: induced draft fan; 25: separator. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Combine the following Figures 1 to 3 The low temperature pulverization microwave sterilization system of the present invention is described.

[0035] like Figure 1 As shown, the low-temperature crushing microwave sterilization system of the embodiment of the present invention includes: a double-stage crushing and freezing component, an energy recovery component and a microwave sterilization component;

[0036] The double-stage crushing and freezing component is used to roughly crush the materials to be processed, then gradually cool and freeze them, and then crush them at low temperature;

[0037] The energy recovery and utilization component includes a rewarming subcomponent and a cooling subcomponent. The rewarming subcomponent is used to perform multi-stage heating and rewarming of the low-temperature materials to be processed output by the double-stage crushing and freezing component. The rewarmed materials to be processed enter the microwave sterilization component, where the materials to be processed move spirally and are sterilized by microwaves. The cooling subcomponent is used to cool the microwave sterilization component using the cold energy of the low-temperature materials to be processed output by the rewarming subcomponent.

[0038] In the embodiment of the present invention, the material to be processed is first roughly crushed in the two-stage crushing and freezing component, then gradually cooled and frozen, and then crushed at low temperature. The crushed low-temperature material to be processed enters the energy recovery component. After multi-stage heating and rewarming, the material to be processed enters the microwave sterilization component and is sterilized in a microwave environment. The bacteria and germs in the material to be processed are destroyed by microwaves to achieve the purpose of sterilization, completing the crushing, rewarming, and sterilization process of the material to be processed. The energy recovery component includes a rewarming subcomponent and a cooling subcomponent. The rewarming subsystem performs multi-stage heating and rewarming on the low-temperature material to be processed from the two-stage crushing and freezing component. The rewarmed material to be processed enters the microwave sterilization component, moves spirally in the microwave sterilization component, and is sterilized by microwaves. The cooling subcomponent uses the cold energy of the low-temperature material to be processed from the rewarming subcomponent to cool the microwave source.

[0039] The low-temperature crushing microwave sterilization system of the embodiment of the present invention performs coarse crushing first and then low-temperature crushing. After the low-temperature crushing, the particle size of the material is finer and more uniform, which solves the hidden danger of material jamming and blockage during normal temperature spiral conveying, and reduces operating costs through energy recovery and cascade utilization.

[0040] On the basis of the above embodiment, the two-stage crushing and freezing component includes a coarse effect crusher 12, a precooler 11, a freezer 15 and a low temperature crusher 13 connected in sequence, the rewarming subassembly includes a separator 25, a low temperature regenerator 14 and a high temperature regenerator 16 connected in sequence, and the low temperature crusher 13 is connected to the separator 25; the microwave sterilization component includes a conveyor 18;

[0041] The separator 25 uses the exhaust gas from the precooler 11 to preheat the material to be processed from the low-temperature crusher 13; the low-temperature regenerator 14 uses the normal-temperature exhaust gas from the coarse-effect crusher 12 to heat the material to be processed from the separator 25; the high-temperature regenerator 16 uses the high-temperature steam inside the conveyor 18 to heat the material to be processed again.

[0042] In the embodiment of the present invention, the material to be processed from the low-temperature pulverizer 13 is first preheated in the separator 25 by using the exhaust gas of the precooler 11, and then the material to be processed from the separator 25 is heated by using the normal temperature exhaust gas of the coarse effect crusher 12 in the low-temperature regenerator 14. Finally, the material to be processed is heated again by using the high-temperature steam inside the conveyor 18 in the high-temperature regenerator 16, so as to realize the three-stage rewarming of the low-temperature pulverized material, that is, the amount of heating in the sterilization process is reduced and the amount of waste heat discharged is reduced. In addition, the low-temperature regenerator 14 is a three-medium heat exchanger, and the low-temperature material to be processed can also be used as a cold source to cool the hot air in the box, so as to realize efficient cooling of the microwave source and the whole machine control components. Therefore, the thermal management system is designed according to the quality of energy, so as to realize the step-by-step utilization of energy, effectively reduce energy loss and have a compact structure.

[0043] It should be noted that the material to be processed is coarsely crushed in the coarse crusher 12, and then enters the precooler 11 for precooling. After completion, it enters the freezer 15, where it is further deeply cooled and frozen, so that the soft materials such as gauze and cotton balls in the material to be processed are frozen into small hard blocks, which helps to crush the material to be processed in the low-temperature crusher 13.

[0044] In the two-stage crushing and intermediate freezing process, the material to be processed is first coarsely crushed and then pre-frozen, which helps to cool the material to be processed more quickly and evenly. The freezing and low-temperature crushing processes are carried out in steps, which on the one hand reduces the loss of low-temperature cooling capacity, and on the other hand greatly reduces the processing difficulty of the low-temperature crusher 13; the material treated with low-temperature freezing has high hardness and is easy to crush, and after the crushing process, small and uniform particles of the material to be processed are formed; in the microwave sterilization process, after multiple stages of rewarming, the particles of the material to be processed enter the conveyor 18, and the fine and uniform particles greatly improve the smoothness of the transportation process. In addition, the fine and uniform granular material also increases the area of ​​microwave irradiation. Multiple factors help the sterilization process to be more sufficient and reasonable, thereby improving the sterilization efficiency and the safety of the treatment process.

[0045] In an optional embodiment, the precooler 11 and the freezer 15 are both configured as belt conveyor mechanisms. The precooler 11 and the freezer 15 have a stirring function to achieve tumbling and mixing of the materials to be processed. The stirring paddle is driven by a variable frequency motor to achieve variable speed adjustment, and the stirring speed is 0-20r / min; a one-way opening baffle is set at the inlet of the materials to be processed of the precooler 11, and the materials open the baffle by gravity to achieve feeding. When there is no material to be processed entering, the baffle is self-sealed by a tension device such as a spring, isolated from the outside world, and prevents the low-temperature fluid circulating inside from leaking out; the low-temperature fluid inlet position of the precooler 11 should be lower than the low-temperature fluid outlet position, and a single-phase valve should be set at the low-temperature fluid inlet position of the precooler 11 to prevent the low-temperature fluid from flowing back.

[0046] The low-temperature fluid outlet of the separator 25 is connected to a filter and a circulating fan. The low-temperature gaseous fluid separated by the separator 25 is filtered by the filter and then enters the circulating fan. The circulating fan is connected to the low-temperature regenerator 14 and the circulating fan sends the low-temperature gaseous fluid to the low-temperature regenerator 14. The filter is used to remove impurities in the low-temperature gaseous fluid, and the circulating fan is used to promote fluid circulation.

[0047] A cyclone separation device is provided in the separator 25. The material to be processed in the low-temperature pulverizer 13 enters the separator 25 tangentially. A conical low-temperature fluid outlet is provided at the bottom of the separator 25. A plurality of annular pipes are arranged along the circular cross-section of the cone. A plurality of low-temperature fluid outlets are opened along the circumference of the annular pipe. The low-temperature fluid outlet is opened along the bottom of the annular pipe, which is helpful for fully separating the material to be processed from the low-temperature gaseous fluid.

[0048] The separator 25 adopts a cyclone separation form, tangential feeding, and relies on gravity to achieve gas-solid separation. The height of the gas phase space is not less than 1m. At the low-temperature gaseous fluid outlet of the bottom cone of the separator 25, a nitrogen annular pipe is arranged along the circular cross-section of the cone, and 8-16 low-temperature gaseous fluid outlets are evenly opened along the circumferential direction of the annular pipe to ensure that the low-temperature gaseous fluid evenly enters the separator 25 cavity. The low-temperature gaseous fluid outlet is opened from the bottom of the annular pipe with an aperture of 10-25mm.

[0049] The low-temperature regenerator 14 is a three-medium heat exchanger, which is divided into three flow channels: inner, middle and outer. The inner flow channel is set as a copper tube with a diameter of 5 mm. The air to be cooled of the cooling subassembly flows in this flow channel. The middle flow channel is set as a channel for the material to be processed. Ribs are added on the outside of the middle flow channel to enhance heat exchange. The outer flow channel is set as a normal temperature gas channel in the coarse-effect crusher 12.

[0050] On the basis of the above embodiment, the low-temperature gas outlet of the freezer 15 is connected to the low-temperature gas inlet of the precooler 11 .

[0051] It should be noted that the low-temperature gas outlet of the freezer 15 is connected to the low-temperature gas inlet of the precooler 11. The ultra-low-temperature fluid first deeply cools and freezes the pre-cooled material to be processed in the freezer 15, and then enters the precooler 11 to pre-cool the material to be processed at room temperature, thereby reducing the heat transfer temperature difference and realizing efficient heat exchange and secondary utilization of low-temperature cold energy. In addition, the countercurrent arrangement of the material to be processed and the low-temperature fluid helps to enhance the heat exchange effect.

[0052] On the basis of the above embodiment, the cooling subassembly includes a cooling fan 9 and electronic control components, and the microwave sterilization assembly includes a microwave generator 17 .

[0053] The low-temperature gas in the low-temperature regenerator 14 passes through the cooling fan 9 to cool the electronic control components and the microwave generator 17 .

[0054] It should be noted that the cooling subassembly includes a first primary and secondary efficiency filter 8 , a cooling fan 9 and electronic control components, which are connected in sequence, and the first primary and secondary efficiency filter 8 is connected to a low-temperature regenerator 14 .

[0055] Based on the above embodiment, the low-temperature crushing microwave sterilization system also includes an ultra-low temperature refrigeration component. The low-temperature gas output by the separator 25 enters the ultra-low temperature refrigeration component. The ultra-low temperature refrigeration component provides an ultra-low temperature cold source for the freezer 15 to deeply cool the pre-cooled material to be processed.

[0056] It should be noted that if Figure 3As shown, the ultra-low temperature refrigeration component includes a third primary and secondary efficiency filter, an electric fresh air valve, a high-efficiency filter, a circulating fan, an ultra-low temperature evaporator 2, a radiator 1, an air cooler 5, a flash tank 6, a low-level compressor 3 and a high-level compressor 4, the second primary and secondary efficiency filter, the high-efficiency filter, the circulating fan, the ultra-low temperature evaporator 2, the air cooler 5 and the two compressors are connected in sequence, the second primary and secondary efficiency filter is connected to the separator 25, the electric fresh air valve is connected to the high-efficiency filter, the radiator is connected to the compressor, and the ultra-low temperature refrigeration component adopts an environmentally friendly working fluid and the temperature adjustment range is 20 to -30°C.

[0057] On the basis of the above embodiment, the low-temperature pulverizing microwave sterilization system further includes an exhaust gas purification component, and the exhaust gas purification component is connected to the exhaust gas outlet of the low-temperature regenerator 14 and the exhaust gas outlet of the high-temperature regenerator 16 .

[0058] In an optional embodiment, the exhaust gas purification component includes an induced draft fan filter 21, a radiator 1, a gas purification component 23 and an induced draft fan 24 connected in sequence, and the refrigerant branch of the ultra-low temperature refrigeration component flows through the radiator 1 to absorb exhaust heat.

[0059] The exhaust gas discharged from the low-temperature regenerator 14 and the high-temperature regenerator 16 enters the induced draft fan filter 21, and then enters the radiator 1 after removing particulate impurities. After condensation, most of the steam medium is removed, and then enters the gas purification component 23 to remove odor in the exhaust gas, and then is discharged through the induced draft fan 24.

[0060] In an optional embodiment, the radiator 1 adopts a fin structure, the condensation method of the radiator 1 adopts an air-cooled cooling method, the cooling capacity of the radiator 1 comes from an ultra-low temperature refrigeration component, which is a high-temperature evaporator of the ultra-low temperature refrigeration component; the gas purification component 23 adopts granular activated carbon adsorption or photocatalytic decomposition.

[0061] On the basis of the above embodiment, the microwave sterilization component includes a humidifier, which is used to perform secondary sterilization and heating and humidification on the materials to be fed onto the conveyor 18 .

[0062] It should be noted that the material to be processed enters the conveyor 18 after being temperature- and humidity-controlled in the humidifier. The material to be processed is microwave-sterilized and moved in the conveyor 18. The conveyor 18 is configured as a screw conveyor.

[0063] The microwave sterilization component includes a microwave generator 17, a screw conveyor and a humidifier. The humidifier is connected to a water storage tank 10. The water storage tank 10 provides a water source with stable pressure to the humidifier, and mixes with the material in the humidifier to reach a predetermined humidity. The humidified material enters the conveyor 18, receives microwave treatment from the microwave generator 17 during the transportation process, and is discharged through the outlet of the conveyor 18, thereby performing secondary sterilization on the material, improving the sterilization effect, and maintaining the effective ingredients.

[0064] In the embodiment of the present invention, the microwave generator 17 uses microwave energy to break bacteria and the like in the material to be processed, thereby achieving a sterilization effect. At the same time, the humidifier heats and humidifies the material to be processed, and the moisture in the material to be processed absorbs the microwave heat and evaporates, thereby reducing the impact of the microwave heat on the material to be processed and preventing the temperature of the material to be processed from being too high.

[0065] In an optional embodiment, the microwave generator 17 is arranged outside the conveyor 18, and the material to be processed is subjected to real-time microwave treatment. A gap is provided between the microwave generator 17 and the outer wall of the conveyor 18, and the gap is set to 3-10 cm. The operating frequency of the microwave generator 17 is set to 2450 MHz, and the outer wall of the conveyor 18 is made of non-conductive dielectric materials such as PP pipe, polytetrafluoroethylene, fiberglass, PVC, etc.

[0066] In an optional embodiment, a rotating nozzle is provided on the top of the humidifier, and the rotating nozzles should be evenly distributed, and the number should be 4-12; the humidifier is connected to a water storage tank 10, and the water storage tank 10 is used to provide water to the humidifier. The water source of the water storage tank 10 is transported to the rotating nozzle on the top of the humidifier via a water pump, and the head of the water pump should be 30-50 meters. Among them, the humidifier is provided with at least two vents, at least one of which is connected to the environment, and at least one of which is connected to the induced draft fan 24. Two vents are provided on the top of the humidifier, and the distance between the two vents should be as large as possible. Ensure air circulation in the humidifier to achieve temperature recovery and humidification of the materials in the humidifier.

[0067] In an embodiment of the present invention, the processed material crushed in the low-temperature pulverizer 13 and the heat-absorbing gas in the precooler 11 enter the separator 25 for heat exchange and separation, and the separated gas flows back to the ultra-low temperature refrigeration component, the preheated processed material, the normal temperature exhaust gas of the coarse effect crusher 12 and the hot air in the whole machine body enter the low-temperature regenerator 14 for heat exchange, the heated processed material enters the high-temperature regenerator 16, and the normal temperature exhaust gas after cooling enters the exhaust gas purification component, and the cooled hot air enters the cooling sub-component, in the high-temperature regenerator 16, the processed material exchanges heat with the high-temperature steam in the conveyor 18, and the cooled steam also enters the exhaust gas purification component, and the processed material after heating three times enters the microwave sterilization component. The microwave sterilization component includes a spray nozzle 19, a microwave generator 17, and a conveyor 18. The high-temperature regenerator 16 is connected to the conveyor 18. The spray nozzle 19 is arranged inside the conveyor 18. The material to be processed enters the conveyor 18. The spray nozzle 19 sprays and humidifies the material to be processed from multiple directions. The microwave generator 17 is arranged on the conveyor. The temperature and humidity of the material to be processed are adjusted during the movement and microwave sterilization is performed.

[0068] While completing the crushing and sterilization, the energy recovery and utilization components are used to recover the system's cold and heat to achieve the cascade utilization of energy, and the ultra-low temperature refrigeration components are used to recover the system's cold and recycle it to achieve energy saving. The coarse effect crusher 12 is connected to the outer gas inlet of the low temperature regenerator 14 through the third primary and secondary efficiency filter, which is used to provide normal temperature exhaust gas to the low temperature regenerator 14 to heat the low temperature materials to be processed. The conveyor 18 inputs high temperature steam to the steam inlet of the high temperature regenerator 16 for further heating the materials to be processed. The cooled exhaust gas from the low temperature regenerator 14 and the condensed steam from the high temperature regenerator 16 enter the tail gas purification component; in this process, the cold energy of the low temperature materials to be processed reduces the waste heat treatment amount of the tail gas treatment system, and the heating amount of the materials to be processed reduces the material heating and absorption heat during the microwave sterilization process, thereby reducing the heat discharge and microwave sterilization power during the operation of the equipment, thereby reducing the equipment operation cost.

[0069] The refrigerant in the ultra-low temperature refrigeration component is divided into two paths. The main path flows through the ultra-low temperature evaporator 2 to provide an ultra-low temperature cold source for the freezer 15, and the branch path flows through the radiator 1 to absorb the exhaust heat of the tail gas purification component. The second primary and secondary efficiency filter is connected to the separator 25. The low-temperature materials to be processed discharged from the low-temperature crusher 13 enter the separator 25 and exchange heat with the circulating gas entering the separator 25 from the precooler 11. The circulating gas absorbs the cold of the low-temperature materials to be processed and then discharges the separator 25. It enters the second primary and secondary efficiency filter to remove larger impurities, and then enters the high-efficiency filter. After purification, it enters the circulating fan, and after pressurization, it enters the ultra-low temperature evaporator 2 for cooling, and then enters the freezer 15 to deeply cool the pre-cooled materials to be processed, and then enters the precooler 11 to exchange cold with the materials to be processed. The circulating gas after absorbing heat in the precooler 11 enters the separator 25 again to recover the cold discharged from the low-temperature crusher 13, thereby achieving energy saving.

[0070] Among them, the fresh air inlet of the ultra-low temperature evaporator 2 is connected to an electric fresh air valve for regulating the flow rate of ultra-low temperature gas between the ultra-low temperature evaporator 2 and the freezer 15.

[0071] In an optional embodiment, the low-temperature crushing microwave sterilization system also includes an elevator 7, which is connected to a coarse-effect crusher 12, and the coarse-effect crusher 12 is connected to a precooler 11. The material to be processed is sent to the coarse-effect crusher 12 through the elevator 7 for coarse crushing and then enters the precooler 11. In the precooler 11, the material to be processed exchanges heat with the circulating low-temperature fluid, and the material to be processed absorbs the cold and cools down to achieve a precooling effect. The precooled material then enters the freezer 15 for deep freezing. The material to be processed is cooled to a set temperature and enters the low-temperature crusher 13 for low-temperature crushing. At the same time, an appropriate amount of low-temperature gas is introduced into the low-temperature crusher 13 to prevent the material from heating up and deteriorating during the crushing process, thereby improving the hardness and brittleness of the material to be processed.

[0072] On the basis of the above embodiment, the low-temperature pulverizing microwave sterilization system further includes a controller, the low-temperature pulverizer 13 is provided with a pulverizer temperature sensor, the separator 25 is provided with a separator temperature sensor, and the humidifier is connected to a humidifier temperature sensor and a humidifier humidity sensor; the pulverizer temperature sensor, the separator temperature sensor, the humidifier temperature sensor and the humidifier humidity sensor are all connected to the controller;

[0073] A low-temperature fluid circulation regulating valve is provided between the low-temperature fluid outlet of the precooler 11 and the separator 25, and a humidification regulating valve is provided at the water inlet of the humidifier; both the low-temperature fluid circulation regulating valve and the humidification regulating valve are connected to the controller.

[0074] The coarse effect crusher 12 is connected with a coarse effect crusher vacuum gauge, the freezer 15 is connected with a freezer temperature sensor, the precooler 11 is connected with a precooler temperature sensor, the conveyor 18 is internally connected with a conveyor vacuum gauge, a conveyor temperature sensor and a conveyor humidity sensor, the surface of the microwave generator 17 is connected with a microwave generator temperature sensor, and the surface of the electronic control components is connected with an electronic control component temperature sensor;

[0075] The vacuum gauge of the coarse effect crusher, the temperature sensor of the freezer, the temperature sensor of the precooler, the vacuum gauge of the conveyor, the temperature sensor of the conveyor, the humidity sensor of the conveyor, the temperature sensor of the microwave generator, and the temperature sensor of the electronic control components are all connected to the controller;

[0076] A low-temperature fluid regulating valve is provided between the freezer 15 and the precooler 11, a normal temperature air volume regulating valve is provided between the coarse effect crusher 12 and the low-temperature regenerator 14, a high-temperature steam regulating valve is provided between the conveyor 18 and the high-temperature regenerator 16, a cooling air volume regulating valve is provided between the low-temperature regenerator 14 and the microwave generator 17 and the electronic control components, and a fresh air regulating valve is provided at the air inlet of the ultra-low temperature evaporator 2;

[0077] The low-temperature fluid regulating valve, the normal-temperature air volume regulating valve, the high-temperature steam regulating valve, the cooling air volume regulating valve, and the fresh air regulating valve are all connected to the controller.

[0078] In the embodiment of the present invention, the controller can use PID control technology and PLC control to monitor and intelligently control the process parameters of each part of the system in real time, so that the control of the equipment is more flexible, and the working processes between the parts are coordinated with each other, thereby improving the reliability of the device. Among them, the pulverizer temperature sensor monitors and adjusts the temperature data of the low-temperature pulverizer 13, realizes the adjustment and control of the temperature of the low-temperature pulverizer 13, and ensures that the working temperature of the low-temperature pulverizer 13 is maintained at a set level.

[0079] The separator temperature sensor and the cryogenic fluid circulation regulating valve are connected to the controller to monitor and adjust the separator temperature data to realize the regulation and control of the temperature of the separator 25. When the temperature of the separator 25 is higher than the set value, the controller calculates and issues a command to reduce the opening of the cryogenic fluid circulation regulating valve. When the temperature of the separator 25 is lower than the set value, the controller calculates and issues a command to increase the opening of the cryogenic fluid circulation regulating valve to ensure that the material temperature of the separator 25 is maintained at the set level.

[0080] An induced draft temperature return regulating valve is provided between the humidifier and the induced draft fan 24. The humidifier temperature sensor and the induced draft temperature return regulating valve are connected to the controller to monitor and adjust the humidifier temperature data to realize the regulation and control of the humidifier temperature. When the humidifier temperature is higher than the set value, the controller calculates and issues a command to reduce the opening of the induced draft temperature return regulating valve. When the humidifier temperature is lower than the set value, the controller calculates and issues a command to increase the opening of the induced draft temperature return regulating valve to ensure that the material temperature of the humidifier is maintained at the set level.

[0081] The humidifier humidity sensor and humidifier regulating valve are connected to the controller to monitor and adjust the humidifier humidity data to achieve regulation and control of the humidifier humidity. When the humidifier humidity is higher than the set value, the controller calculates and issues a command to reduce the opening of the humidifier regulating valve. When the humidifier humidity is lower than the set value, the controller calculates and issues a command to increase the opening of the humidifier regulating valve to ensure that the material humidity of the humidifier is maintained at the set level.

[0082] Based on the above embodiments, Figure 2 As shown, in order to facilitate the installation and construction of the equipment, a spatial layout of a low-temperature crushing microwave sterilization system is also provided. The coarse-effect crusher 12 is arranged above the precooler 11, and the outlet of the precooler 11 for the material to be processed is connected to the inlet of the freezer 15 for the material to be processed. The low-temperature crusher 13 is arranged below the freezer 15 and is not lower than the separator 25. The separator 25 is arranged above the low-temperature regenerator 14, and the outlet of the low-temperature regenerator 14 for the material to be processed is connected to the inlet of the high-temperature regenerator 16 for the material to be processed. The outlet of the high-temperature regenerator 16 for the material to be processed is connected to the conveyor 18. The conveyor 18 is arranged at the bottom layer to facilitate the smooth entry of the material to be processed into the conveyor, prevent material blockage, and reduce conveying power.

[0083] The third primary and secondary efficiency filter is arranged below the coarse effect crusher 12 and is not lower than the low temperature heat regenerator 14. The installation height of the first primary and secondary efficiency filter 8 is not higher than the low temperature heat regenerator 14. The first primary and secondary efficiency filter 8, the cooling fan 9 and the microwave generator 17 are connected through a pipeline. The installation height of the cooling fan 9 is not higher than the microwave generator 17, which is convenient for gas flow.

[0084] The microwave generator 17 is arranged outside the conveyor 18, and the spray nozzles 19 are arranged inside the conveyor 18 and are not evenly spaced. The spray nozzles 19 are connected to a water tank 10. The water source in the water tank 10 enters the spray nozzles 19 after being pressurized by a water pump. The installation position of the water pump is lower than the water source liquid level in the water tank 10. The water tank 10 is equipped with an automatic water replenishing device and is also arranged at the bottom layer to ensure the stability of the water supply in the spray nozzles 19.

[0085] The ultra-low temperature evaporator 2 is installed at a position not higher than the freezer 15, and the air cooler 5 and the compressor are also arranged at the bottom layer for easy operation and control; the circulating fan, the high-efficiency filter and the second primary and secondary filter are connected in sequence and are connected to the separator through a pipeline, the installation position of the second primary and secondary filter is not lower than the outlet of the separator 25, the installation position of the circulating fan is not higher than the ultra-low temperature evaporator 2, and the electric fresh air valve is connected to the high-efficiency filter through a pipeline to adjust the fresh air volume at the inlet of the ultra-low temperature evaporator;

[0086] The induced draft fan filter is connected to the low-temperature regenerator 14 and the high-temperature regenerator 16, and the installation position of the induced draft fan filter is not lower than the exhaust gas outlet of the low-temperature regenerator and the high-temperature regenerator. The induced draft fan filter is connected to the radiator 1, and the installation position of the induced draft fan filter is not higher than the radiator 1;

[0087] The installation height of the gas purification component 23 shall not be lower than the installation height of the radiator 1, and the installation height of the induced draft fan 24 shall not be lower than the installation height of the gas purification component 23, so as to facilitate the gas flow in the gas purification component. The spatial arrangement of the various components of the system needs to take into account the volume, weight, operating status, installation requirements and other requirements of the equipment, and can be adjusted according to actual needs.

[0088] Cryogenic fluids such as liquid nitrogen are used for low-temperature pulverization, and the cold energy of the cryogenic fluid is recycled. The microwave sterilization component uses microwave energy to destroy the bacteria in the material to be processed, and cooperates with the tail gas purification component to treat the tail gas to meet the requirements of environmentally friendly emissions. While completing the pulverization and sterilization, the low-temperature sub-components are used to recycle the system cold energy to achieve energy saving and ultimately ensure the stable operation of the system.

[0089] The low-temperature crushing microwave sterilization system of the embodiment of the present invention includes multiple systems such as energy recovery and utilization, low-temperature crushing process, ultra-low temperature refrigeration, and tail gas treatment, which are used for low-temperature crushing, tail gas cooling, microwave generator and electronic control components cooling in order from high to low cold energy quality; according to the principle of "temperature matching and step-by-step matching", the step-by-step utilization of energy is realized; the material to be processed undergoes two-stage crushing and intermediate freezing treatment, and the material particles in the conveying process are finer and more uniform, realizing smooth conveying by the screw conveyor; the freezing and low-temperature crushing processes are carried out step by step, which on the one hand reduces the loss of cold energy and makes the temperature of the material to be processed faster and more uniform, and on the other hand greatly reduces the processing difficulty of the low-temperature crusher; the perfect control system realizes real-time monitoring and automatic control of key parameters such as coarse crushing and low-temperature crushing of the material to be processed, energy recovery and utilization, spray humidification, microwave sterilization, and ultra-low temperature cooling, so as to achieve full process automation of medical waste treatment and reduce labor costs; the environmentally friendly ultra-low temperature refrigeration component adopts carbon dioxide as a natural working fluid, which is natural, environmentally friendly and pollution-free.

[0090] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low-temperature crushing microwave sterilization system, characterized in that: include: Double-stage crushing and freezing components, energy recovery components, and microwave sterilization components; The two-stage crushing and freezing component is used to roughly crush the material to be processed, then gradually cool and freeze it, and then crush it at low temperature; the energy recovery component includes a reheating subcomponent and a cooling subcomponent, and the reheating subcomponent is used to perform multi-stage heating and reheating on the low-temperature material to be processed output by the two-stage crushing and freezing component. The reheated material to be processed enters the microwave sterilization component, and the material to be processed moves spirally in the microwave sterilization component and is microwave sterilized; The cooling subassembly is used to cool the microwave sterilization assembly by utilizing the cold energy of the low-temperature material to be processed output by the rewarming subassembly; The two-stage crushing and freezing component includes a coarse-effect crusher, a precooler, a freezer and a low-temperature crusher connected in sequence; the rewarming subcomponent includes a separator, a low-temperature regenerator and a high-temperature regenerator connected in sequence, and the low-temperature crusher is connected to the separator; the microwave sterilization component includes a conveyor; The separator uses the exhaust gas of the precooler to preheat the material to be processed from the low-temperature pulverizer; the low-temperature regenerator uses the normal-temperature exhaust gas of the coarse-effect crusher to heat the material to be processed from the separator; the high-temperature regenerator uses the high-temperature steam inside the conveyor to heat the material to be processed again; The low-temperature gas outlet of the freezer is connected to the low-temperature gas inlet of the precooler; The cooling subassembly includes a cooling fan and electronic control components, and the microwave sterilization assembly includes a microwave generator; the low-temperature gas in the low-temperature regenerator cools the electronic control components and the microwave generator after passing through the cooling fan; The low-temperature pulverizing microwave sterilization system also includes an ultra-low temperature refrigeration component. The low-temperature gas output by the separator enters the ultra-low temperature refrigeration component. The ultra-low temperature refrigeration component provides an ultra-low temperature cold source for the freezer to deeply cool the pre-cooled material to be processed.

2. The low-temperature pulverizing microwave sterilization system according to claim 1, characterized in that: The coarse-effect crusher is arranged above the precooler, and the outlet of the precooler for processed materials is connected to the inlet of the freezer for processed materials. The low-temperature crusher is arranged below the freezer and is not lower than the separator. The separator is arranged above the low-temperature regenerator, and the outlet of the low-temperature regenerator for processed materials is connected to the inlet of the high-temperature regenerator for processed materials. The outlet of the high-temperature regenerator for processed materials is connected to the conveyor, and the conveyor is arranged at the bottom layer.

3. The low-temperature pulverizing microwave sterilization system according to claim 1, characterized in that: The low-temperature pulverizing microwave sterilization system further comprises an exhaust gas purification component, and the exhaust gas purification component is connected to the exhaust gas outlet of the low-temperature regenerator and the exhaust gas outlet of the high-temperature regenerator.

4. The low-temperature pulverizing microwave sterilization system according to claim 3, characterized in that: The tail gas purification component includes an induced draft fan filter, a radiator, a gas purification component and an induced draft fan which are connected in sequence. The refrigerant branch of the ultra-low temperature refrigeration component flows through the radiator to absorb exhaust heat.

5. The low-temperature crushing microwave sterilization system according to claim 1, characterized in that: The microwave sterilization component includes a humidifier, and the humidifier is used to perform secondary sterilization and heating and humidification on the materials to be introduced onto the conveyor.

6. The low-temperature pulverizing microwave sterilization system according to claim 5, characterized in that: The low-temperature pulverizing microwave sterilization system also includes a controller, the low-temperature pulverizer is provided with a pulverizer temperature sensor, the separator is provided with a separator temperature sensor, and the humidifier is connected to a humidifier temperature sensor and a humidifier humidity sensor; the pulverizer temperature sensor, the separator temperature sensor, the humidifier temperature sensor and the humidifier humidity sensor are all connected to the controller; A low-temperature fluid circulation regulating valve is provided between the low-temperature fluid outlet of the precooler and the separator, and a humidification regulating valve is provided at the water inlet of the humidifier; the low-temperature fluid circulation regulating valve and the humidification regulating valve are both connected to the controller.

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