CN109304349B - Medical waste treatment system - Google Patents
Medical waste treatment system Download PDFInfo
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- CN109304349B CN109304349B CN201811287932.3A CN201811287932A CN109304349B CN 109304349 B CN109304349 B CN 109304349B CN 201811287932 A CN201811287932 A CN 201811287932A CN 109304349 B CN109304349 B CN 109304349B
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- Prior art keywords
- container
- pipeline
- reaction kettle
- feeding
- incinerator
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- 239000002906 medical waste Substances 0.000 title claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 230000001590 oxidative effect Effects 0.000 claims abstract description 33
- 239000012028 Fenton's reagent Substances 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 16
- 230000001954 sterilising effect Effects 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000007921 spray Substances 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 239000012295 chemical reaction liquid Substances 0.000 claims abstract description 8
- 239000002912 waste gas Substances 0.000 claims abstract description 6
- 230000000593 degrading effect Effects 0.000 claims abstract description 4
- 244000052769 pathogen Species 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 57
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000010521 absorption reaction Methods 0.000 claims description 14
- 239000000945 filler Substances 0.000 claims description 12
- 238000009833 condensation Methods 0.000 claims description 9
- 230000005494 condensation Effects 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 7
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000012071 phase Substances 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 239000000356 contaminant Substances 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 20
- 230000008569 process Effects 0.000 abstract description 13
- 239000000126 substance Substances 0.000 abstract description 9
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 238000009270 solid waste treatment Methods 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 15
- 239000000243 solution Substances 0.000 description 13
- 239000002699 waste material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000002458 infectious effect Effects 0.000 description 1
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 description 1
- 230000005541 medical transmission Effects 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/0075—Disposal of medical waste
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processing Of Solid Wastes (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to the technical field of dangerous solid waste treatment, and the existing incineration treatment process is easy to produce secondary pollution. The invention provides a medical waste treatment system, which comprises a treatment container, a heating device and a control device, wherein the treatment container is used for degrading and sterilizing pollutants and pathogens in medical waste; the oxidizing solution preparing container is used for preparing Fenton reagent and is connected with the processing container through a feeding pipeline; the incinerator is used for incinerating Fenton reaction liquid and residual sterilizing waste gas in the container and is communicated with the treatment container or the oxidizing liquid preparation container; and the cooling pipeline is used for rapidly cooling high-temperature gas discharged from the incinerator, is connected with an air outlet of the incinerator and is internally provided with a spray header. Can efficiently treat medical waste, reduce the emission of harmful substances and reduce the pollution to the environment.
Description
Technical Field
The invention relates to the technical field of dangerous solid waste treatment, in particular to a medical waste treatment system.
Background
Medical waste refers to waste generated by medical and health institutions in medical, preventive, health care and other related activities, which is directly or indirectly infectious, toxic and other hazardous. Medical waste may contain a large amount of pathogenic microorganisms and harmful chemical substances, and even radioactive and damaging substances, and thus, if the medical waste is improperly treated, it may cause sanitary and environmental problems such as disease transmission, polluted water, etc.
Therefore, china promulgates the national institute No. 380 medical waste management regulations, and definite standardized management is carried out on the collection, classification, storage, transportation, disposal and supervision of medical wastes. Regulations clearly dictate that medical waste be responsible for collection and sorting by medical institutions, and for transportation and centralized disposal by establishing centralized disposal centers throughout.
The treatment technology adopted by the medical waste treatment centers in various places at present mainly comprises an incineration method (accounting for 50%) and a high-temperature steam method (accounting for 44%). The incineration method is a process of decomposing and carbonizing medical waste by using a high-temperature oxidation method. The incineration method can reduce the volume of medical waste to a large extent, has high treatment efficiency, and is widely adopted by various centralized treatment centers. However, due to the complex medical waste components, the existing incineration process is easy to produce harmful substances due to insufficient incineration or the characteristics of medical waste in the incineration process by directly incinerating the crushed medical waste particles, and secondary pollution such as dioxin and the like is produced to the surrounding environment along with the discharge of the waste gas into the air.
In recent years, high-temperature steam treatment methods for medical wastes are gradually popularized and applied. The high-temperature steam method is a process for sterilizing medical waste at high temperature by utilizing high-temperature steam, and the sterilized medical waste is treated as household garbage. Although the high-temperature steam process can carry out batch treatment on medical wastes, more complex chemical substances and odor emission can be generated in the process, and the surrounding environment is greatly influenced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a medical waste treatment system which can efficiently treat medical waste, reduce the emission of harmful substances and reduce the pollution to the environment.
In order to achieve the above purpose, the present invention is realized by the following technical scheme: a medical waste treatment system comprising a treatment vessel for degrading and sterilizing contaminants and pathogens in medical waste, provided with heating means; the oxidizing solution preparing container is used for preparing Fenton reagent and is connected with the processing container through a feeding pipeline; the incinerator is used for incinerating Fenton reaction liquid and residual sterilizing waste gas in the container and is communicated with the treatment container or the oxidizing liquid preparation container; and the cooling pipeline is used for rapidly cooling high-temperature gas discharged from the incinerator, is connected with an air outlet of the incinerator and is internally provided with a spray header.
By adopting the technical scheme, the system can utilize Fenton reaction and heat to remove pollutants and bacteria in medical waste, and the reaction liquid after Fenton reaction is burnt in an injection manner through the incinerator, so that the combustion is sufficient, the emission of harmful substances is reduced, and the pollution to the environment is reduced.
The invention further preferably comprises the following steps: the treatment container is a reaction kettle, the upper end part of the reaction kettle is provided with a feed inlet, the side surface of the reaction kettle is provided with a discharge outlet, and the feed inlet and the discharge outlet are provided with sealing covers; the crushing device is arranged above the feeding hole and comprises a feeding hopper and at least one pair of crushing rollers for crushing medical wastes into particles, and the crushing rollers are arranged in the feeding hopper.
By adopting the technical scheme, the crushing device disclosed by the invention can crush the medical waste into particles, so that the contact area of the medical waste and the Fenton reagent can be increased, and the reaction speed is further increased.
The invention further preferably comprises the following steps: a pair of sliding rails are arranged above the reaction kettle, one end of each sliding rail extends to the discharge port, and the charging hopper slides on the sliding rails through pulleys; when feeding, the hopper is positioned right above the feed inlet, and the sealing cover on the feed inlet is opened. So that the feeding can be convenient.
The invention further preferably comprises the following steps: the feeding pipeline is internally provided with a high-pressure feeding circulating pump for pumping Fenton reagent into the reaction kettle, and is provided with a heater for heating liquid in the pipeline; and a one-way valve is arranged between the high-pressure feeding circulating pump and the reaction kettle, and when the high-pressure feeding circulating pump works, liquid flows into the treatment container through the high-pressure feeding circulating pump and the one-way valve in sequence.
By adopting the technical scheme, the one-way valve prevents backflow, and the heater is used for preheating the Fenton reagent.
The invention further preferably comprises the following steps: the reaction kettle is cylindrical, a filter plate is arranged at the bottom of the reaction kettle, the bottom surface of the reaction kettle is connected with a three-way backflow pipeline, an inlet of the three-way backflow pipeline is connected with the bottom of the reaction kettle, one outlet of the three-way backflow pipeline is communicated with a feeding pipeline through a high-pressure feeding circulating pump and is in backflow with the reaction kettle, the other outlet of the three-way backflow pipeline is communicated with an oxidizing liquid blending container, and the three-way backflow pipeline is provided with a filter and a plurality of valves; the outlet of the feeding pipeline is positioned on the annular side wall of the reaction kettle and tangent to the annular side wall of the reaction kettle.
By adopting the technical scheme, in the circulating process, as the outlet of the feeding pipeline is tangent to the annular side wall of the reaction kettle, fenton reagent coming out of the outlet of the feeding pipeline forms a vortex in the reaction kettle, and then enters the reflux pipeline from the bottom of the vortex, and medical waste particles continuously turn over along with the process of vortex re-rotation, so that the stirring effect is achieved, and the Fenton reaction process is accelerated.
The invention further preferably comprises the following steps: the reaction kettle is provided with a condensation pipeline, one port of the condensation pipeline is communicated with the upper end of the reaction kettle, the other port of the condensation pipeline is provided with a gas-liquid separator, a liquid phase outlet of the gas-liquid separator is connected with an oxidizing liquid blending container, and a gas phase outlet of the gas-liquid separator is connected with the incinerator.
By adopting the technical scheme, on one hand, the temperature of the reaction kettle is controlled by adjusting the air pressure, and on the other hand, the steam in the reaction kettle can be recycled.
The invention further preferably comprises the following steps: the oxidizing solution preparing container is respectively connected with a hydrogen peroxide storage tank and a ferrous iron storage tank through pipelines; the pipelines of the two storage tanks and the oxidizing liquid blending container are respectively provided with a valve and a charging metering pump for regulating the flow during charging and conveniently controlling the additive amount.
The invention further preferably comprises the following steps: the incinerator is internally provided with a spray head, and an air compression device for assisting the spray head to atomize fuel and Fenton reaction liquid is arranged outside the incinerator.
The invention further preferably comprises the following steps: the cooling pipeline outlet end is equipped with the absorption tower, is equipped with the filler in the absorption tower, has the water catch bowl below the filler, is equipped with first shower head above the filler, be equipped with the second shower head in the cooling pipeline, the water catch bowl is connected with first shower head and second shower head pipeline respectively through a water pump.
By adopting the technical scheme, the cooling water is recycled, and water resources are saved.
The invention further preferably comprises the following steps: a chimney is arranged at the outlet of the absorption tower, and a high-temperature fan for accelerating exhaust is arranged between the chimney and the absorption tower.
In summary, the invention has the following beneficial effects: the Fenton reagent is utilized to degrade pollutants and sterilize by heating, and the used Fenton reagent is subjected to jet combustion treatment, so that the Fenton reagent is combusted fully.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1. crushing rollers; 2. a hopper; 3. a slide rail; 4. a processing container; 41. a feed inlet; 42. a discharge port; 43. a filter plate; 44. a filter; 45. a gas-liquid separator; 5. an oxidizing solution preparation container; 51. a hydrogen peroxide storage tank; 52. a ferrous iron storage tank; 53. a high pressure feed circulation pump; 54. a one-way valve; 55. a heater; 6. an incinerator; 61. an air compression device; 7. a cooling pipe; 8. an absorption tower; 81. a filler; 82. a water collection tank; 83. a first showerhead; 84. a second showerhead; 85. a chimney; 86. a high temperature fan; 9. and a vacuum pump.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is merely illustrative of the present invention and is not intended to be limiting, and modifications thereof without creative contribution can be made by those skilled in the art after reading the present specification, as long as they are protected by patent laws within the scope of claims of the present invention.
As shown in fig. 1, a medical waste treatment system is shown, comprising a main treatment vessel 4, an oxidizing liquid preparation vessel 5, an incinerator 6 and a cooling pipe 7.
A treatment vessel 4 for degrading and sterilizing contaminants and pathogens in medical waste is provided with heating means. And the oxidizing solution preparing container 5 is used for preparing Fenton reagent and is connected with the processing container 4 through a feeding pipeline. And the incinerator 6 is used for incinerating the Fenton reaction liquid and the residual sterilizing waste gas in the container and is communicated with the treatment container 4 or the oxidizing liquid preparation container 5. And the cooling pipeline 7 is used for rapidly cooling high-temperature gas discharged from the incinerator 6, is connected with an exhaust port of the incinerator 6 and is internally provided with a spray header.
The treatment container 4 is a reaction kettle, the upper end part of the reaction kettle is provided with a feed inlet 41, the side surface of the reaction kettle is provided with a discharge outlet 42, and both the feed inlet 41 and the discharge outlet 42 are provided with sealing covers. A crushing device is arranged above the feed inlet 41, and comprises a feed hopper 2 and at least one pair of crushing rollers 1 for crushing medical wastes into particles, wherein the crushing rollers 1 are arranged in the feed hopper 2.
In order to facilitate the quick closing of the sealing cover after feeding, a pair of sliding rails 3 are arranged above the reaction kettle, one end of each sliding rail 3 extends to a discharge hole 42, and the hopper 2 slides on the sliding rails 3 through pulleys. During charging, the sealing cover on the feed inlet 41 is opened, the charging hopper 2 moves to the position right above the feed inlet 41, and the crushing device begins to work again.
The oxidizing solution preparing container 5 is respectively connected with a hydrogen peroxide storage tank 51 and a ferrous iron storage tank 52 through pipelines; the two storage tanks are respectively provided with a valve and a feeding metering pump which is used for adjusting the flow during feeding and is convenient for controlling the additive amount on the pipelines connected with the oxidizing liquid blending container 5.
A high-pressure feeding circulating pump 53 for pumping Fenton reagent into the reaction kettle is arranged in the feeding pipeline, and a heater 55 for heating liquid in the pipeline is arranged on the feeding pipeline; a one-way valve 54 is arranged between the high-pressure feeding circulating pump 53 and the reaction kettle, and when the high-pressure feeding circulating pump 53 works, liquid flows into the treatment container 4 through the high-pressure feeding circulating pump 53 and the one-way valve 54 in sequence.
The reaction kettle is cylindrical, a filter plate 43 is arranged at the bottom of the reaction kettle, a three-way backflow pipeline is connected to the bottom of the reaction kettle, an inlet of the three-way backflow pipeline is connected with the bottom of the reaction kettle, one outlet of the three-way backflow pipeline is communicated with a feeding pipeline through a high-pressure feeding circulating pump 53 and is in backflow with the reaction kettle, the other outlet of the three-way backflow pipeline is communicated with an oxidizing liquid blending container 5, and a filter 44 and a plurality of valves are arranged on the three-way backflow pipeline; the outlet of the feeding pipeline is positioned on the annular side wall of the reaction kettle and tangent to the annular side wall of the reaction kettle.
The reaction kettle is provided with a condensation pipeline, one port of the condensation pipeline is communicated with the upper end of the reaction kettle, the other port of the condensation pipeline is provided with a gas-liquid separator 45, a liquid phase outlet of the gas-liquid separator 45 is connected with an oxidizing liquid blending container 5, and a gas phase outlet of the gas-liquid separator 45 is connected with an incinerator 6. In order to facilitate the exhaustion of the sterilizing exhaust gas (residual gas) in the container after the completion of the sterilization, a vacuum pump 9 for evacuating is further provided between the gas path outlet of the gas-liquid separator 45 and the incinerator 6. The air outlet of the vacuum pump 9 is also connected with the incinerator 6. The medical waste residues are dried and cooled extremely rapidly due to negative pressure while vacuumizing.
The burner 6 is externally connected with a burner for providing a long-burning fire source to the interior of the burner, and the fuel used by the burner can be fuel oil or natural gas. One end of the combustion chamber of the incinerator 6 is provided with a sterilizing waste liquid sprayer which is atomized by the aid of compressed air, and the sterilizing waste liquid sprayer is connected with an air compression device 61. The waste gas after sterilization is directly communicated into the combustion chamber of the incinerator 6, the Fenton reaction waste liquid is atomized in the nozzle by compressed air and then enters the combustion chamber, and combustible substances generate a large amount of heat under the combustion supporting of the open flame of the burner, so that the internal temperature of the combustion chamber of the incinerator 6 is increased to 850-1200 ℃, and all the combustible substances are rapidly oxidized and decomposed at the temperature. The air in the combustion chamber is supplemented by an oxygen supplementing fan, is blown into the combustion chamber through an air pipe after being heated to a certain temperature by a furnace outlet heat exchanger, is blown into the combustion chamber in the tangential direction of the outer circle, generates spiral rotary air in the combustion chamber, rotates in the furnace with the combustion material by taking a horizontal shaft as the center and moves to the furnace outlet of the combustion chamber, so that the residence time of the combustion material in the combustion chamber is ensured to be longer than 2 seconds.
The cooling pipeline 7 is internally provided with 1-6 second spray headers 84, and water is sprayed to the high-temperature tail gas of the pipeline so as to quickly cool the high-temperature tail gas.
The outlet end of the cooling pipeline 7 is provided with an absorption tower 8, a filler 81 is arranged in the absorption tower 8, and the filler 81 can be Raschig rings or similar fillers for increasing the contact area of high-temperature gas and water in the absorption tower 8 so as to increase the cooling effect on the high-temperature gas. A water collecting tank 82 is arranged below the filler 81, a first spray header 83 is arranged above the filler 81, and the water collecting tank 82 is respectively connected with the first spray header 83 and a second spray header 84 through a water pump in a pipeline mode. So that the cooling water can be recycled, and water resources are saved. An automatic liquid level meter is arranged in the water collecting tank, and water is automatically supplemented by a tap water pipe.
A chimney 85 is arranged at the outlet of the absorption tower 8, and a high-temperature fan 86 for accelerating exhaust is arranged between the chimney 85 and the absorption tower 8.
The invention has the following specific working processes:
180kg of medical waste is placed in a hopper 2, crushed into particles by a crushing roller 1, and dropped from the hopper 2 onto a filter plate 43 in a treatment vessel 4.
In the hydrogen peroxide storage tank 51, 30L of a hydrogen peroxide solution having a concentration of 50% (w/w) was injected into the oxidizing solution preparation vessel 5 by a feed pump. In the ferrous iron storage tank 52, 3 g of ferrous sulfate heptahydrate was dissolved in 10L of water, injected into the oxidizing solution preparation vessel 5 by a feed pump, and water was added to 600L. And acetic acid is used for adjusting the pH value of the solution in the oxidizing solution preparing container 5 to 4-5.
Except for the vent valve (the vent valve is arranged on the gas phase outlet of the gas-liquid separator 45), the various inlets and outlets and valves of the processing container 4 are closed, the high-pressure feed circulating pump 53 and the heater 55 are started, the Fenton reagent is injected into the processing container 4 while heating, after the Fenton reagent is injected, the vent valve is closed, the valve on the filter 44 is opened, the valve between the high-pressure feed circulating pump 53 and the oxidizing liquid blending container 5 is cut off, and the valve on the three-way return pipeline is opened, which is directly connected to the high-pressure feed circulating pump 53. Since the Fenton reagent is injected into the processing container 4 and the temperature rises due to heating, the air pressure in the processing container 4 rises, and when the valve on the filter 44 is opened, the Fenton reagent in the processing container 4 is introduced into the high-pressure feed circulation pump 53 through the return pipe by the air pressure in the processing container 4, and the oxidizing liquid is continuously refilled into the processing container 4. The reagent solution is continuously heated during the continuous circulation.
Meanwhile, in the circulation process, as the outlet of the feeding pipeline is tangent to the annular side wall of the reaction kettle, fenton reagent coming out of the outlet of the feeding pipeline forms a vortex in the reaction kettle, and then enters the reflux pipeline from the bottom of the vortex, and waste particles continuously turn over along with the vortex in the process of rotating again, so that the stirring effect (namely disturbance) is achieved, and the Fenton reaction process is accelerated.
Along with the heating process, when the temperature in the container gradually rises to 100 ℃, preserving heat and circulating the oxidizing solution for 20 minutes, (adding hydrogen peroxide to the oxidizing solution preparation container 5 for supplementing in the circulating process), closing a valve of a hydrogen peroxide feeding pump to the oxidizing solution preparation container 5, opening a valve of a hydrogen peroxide direct injection return pipe, and directly injecting 30L of hydrogen peroxide solution with the concentration of 50% (w/w) into the return pipe so as to compensate the consumption of the hydrogen peroxide in the Fenton reaction process, and continuing the heat preservation and circulation for 20 minutes.
The incinerator 6 is started, and the burner is started until the normal working state of 850-1200 ℃. After 20 minutes of incubation cycle, heating was stopped. Compressed air is injected into the treatment container 4, and the reacted Fenton reaction liquid is completely discharged into the oxidizing liquid preparation container 5 for temporary storage. After all the oxidizing liquid enters the oxidizing liquid preparing container 5, the compressed air is closed, and the valve before the filter 44 is closed. The valve of the incinerator 6 is closed, the vacuum pump 9 is started, the front valve and the rear valve of the vacuum pump 9 are opened, and the treatment container 4 is vacuumized. With the improvement of the vacuum degree, the moisture in the medical waste residues in the treatment container volatilizes, and the temperature is reduced. When the temperature is lower than 50 ℃, the front and rear valves of the vacuum pump 9 are closed, the top air release valve of the treatment container 4 is closed, the valve of the incinerator 6 is opened, and the front and rear valves of the vacuum pump 9 are opened. Opening the top emptying valve of the treatment container 4, opening the discharge port 42 of the treatment container 4, and taking out the treated medical waste particles.
Claims (4)
1. A medical waste treatment system, comprising
A treatment container (4) for degrading and sterilizing contaminants and pathogens in the medical waste, provided with a heating device;
the oxidizing solution preparing container (5) is used for preparing Fenton reagent and is connected with the processing container (4) through a feeding pipeline;
an incinerator (6) for incinerating the Fenton reaction liquid and the residual sterilizing waste gas in the container, and communicating with the treatment container (4) or the oxidizing liquid preparing container (5);
the cooling pipeline (7) is used for rapidly cooling high-temperature gas discharged from the incinerator (6), is connected with an exhaust port of the incinerator (6) and is internally provided with a spray header;
the treatment container (4) is a reaction kettle, a feed inlet (41) is arranged at the upper end part of the reaction kettle, a discharge outlet (42) is arranged on the side surface of the reaction kettle, and sealing covers are arranged at the feed inlet (41) and the discharge outlet (42); a crushing device is arranged above the feed inlet (41), the crushing device comprises a feed hopper (2) and at least one pair of crushing rollers (1) for crushing medical wastes into particles, and the crushing rollers (1) are arranged in the feed hopper (2);
a pair of sliding rails (3) are arranged above the reaction kettle, one end of each sliding rail (3) extends to a discharge hole (42), and the charging hopper (2) slides on the sliding rails (3) through pulleys; when feeding, the feeding hopper (2) is positioned right above the feeding port (41), and a sealing cover on the feeding port (41) is opened;
a high-pressure feeding circulating pump (53) for pumping Fenton reagent into the reaction kettle is arranged in the feeding pipeline, and a heater (55) for heating liquid in the pipeline is arranged on the feeding pipeline; a one-way valve (54) is arranged between the high-pressure feeding circulating pump (53) and the reaction kettle, and when the high-pressure feeding circulating pump (53) works, liquid flows into the treatment container (4) through the high-pressure feeding circulating pump (53) and the one-way valve (54) in sequence;
the reaction kettle is cylindrical, a filter plate (43) is arranged at the bottom of the reaction kettle, the bottom surface of the reaction kettle is connected with a three-way backflow pipeline, an inlet of the three-way backflow pipeline is connected with the bottom of the reaction kettle, an outlet of the three-way backflow pipeline is communicated with a feeding pipeline through a high-pressure feeding circulating pump (53) and is in backflow with the reaction kettle, the other outlet of the three-way backflow pipeline is communicated with an oxidizing liquid blending container (5), and a filter (44) and a plurality of valves are arranged on the three-way backflow pipeline; the outlet of the feeding pipeline is positioned on the annular side wall of the reaction kettle and tangent to the annular side wall of the reaction kettle;
the oxidizing solution preparing container (5) is respectively connected with a hydrogen peroxide storage tank (51) and a ferrous iron storage tank (52) through pipelines; the pipelines of the two storage tanks and the oxidizing liquid blending container (5) are respectively provided with a valve and a charging metering pump which is used for adjusting the flow during charging and is convenient for controlling the additive amount;
the cooling pipeline (7) exit end is equipped with absorption tower (8), is equipped with filler (81) in absorption tower (8), has water catch bowl (82) below filler (81), and filler (81) top is equipped with first shower head (83), be equipped with second shower head (84) in cooling pipeline (7), water catch bowl (82) respectively with first shower head (83) and second shower head (84) pipe connection through a water pump.
2. The medical waste treatment system according to claim 1, wherein the reaction kettle is provided with a condensation pipeline, one port of the condensation pipeline is communicated with the upper end of the reaction kettle, the other port of the condensation pipeline is provided with a gas-liquid separator (45), a liquid phase outlet of the gas-liquid separator (45) is connected with the oxidizing liquid preparation container (5), and a gas phase outlet of the gas-liquid separator (45) is connected with the incinerator (6).
3. Medical waste treatment system according to claim 1, characterized in that the incinerator (6) is internally provided with a spray head, and that an air compression device (61) for assisting the spray head in atomizing the fuel and the Fenton reaction liquid is arranged outside the incinerator (6).
4. The medical waste treatment system according to claim 1, wherein a chimney (85) is provided at the outlet of the absorption tower (8), and a high temperature fan (86) for accelerating the exhaust gas is provided between the chimney (85) and the absorption tower (8).
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| CN201811287932.3A CN109304349B (en) | 2018-10-31 | 2018-10-31 | Medical waste treatment system |
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| CN201811287932.3A CN109304349B (en) | 2018-10-31 | 2018-10-31 | Medical waste treatment system |
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| CN109304349B true CN109304349B (en) | 2023-11-07 |
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| CN111672865B (en) * | 2020-04-22 | 2024-10-15 | 常州博睿杰能环境技术有限公司 | Mobile medical waste sterilization equipment |
| CN111678137A (en) * | 2020-06-15 | 2020-09-18 | 南京贝克勒尔智能科技有限公司 | Medical waste treatment system |
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Denomination of invention: A medical waste treatment system Granted publication date: 20231107 Pledgee: Agricultural Bank of China Limited by Share Ltd. Jiaxing branch Pledgor: GRI MEDICAL & ELECTRONIC TECHNOLOGY Co.,Ltd. Registration number: Y2024980043093 |