Intelligent treatment system and method for waste anesthetic gas

Abstract

The invention relates to the technical field of anesthetic waste gas treatment, and discloses an anesthetic waste gas intelligent treatment system and method.The anesthetic waste gas intelligent treatment system comprises two processor shells which are spliced up and down, a treatment cavity is formed between the two processor shells, and partition plates are fixedly arranged in the middles of the two processor shells and divide the treatment cavity into two sliding cavities; two filter element sleeves are arranged in each sliding cavity, and activated carbon filter elements are embedded into the filter element sleeves and used for adsorbing waste anesthetic gas. According to the improved activated carbon filter element and the technology for coating the surface of the activated carbon filter element with the metal oxide coating, the adsorption effect of the activated carbon filter element on anesthetic gas can be improved, and it can be guaranteed that the gas passing rate is not affected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anesthetic waste gas treatment, and particularly relates to an intelligent anesthetic waste gas treatment system and method. BACKGROUND

[0002] In the medical field, especially in the operating room and the anesthesiology department, the treatment of anesthetic waste gas is an important environmental and health problem. Anesthetic waste gas mainly includes volatile organic compounds such as sevoflurane and isoflurane. If these gases are directly discharged into the atmosphere, not only will they pollute the environment, but they may also adversely affect the health of medical staff and patients.

[0003] In the traditional technology, activated carbon filter cartridges are usually used to adsorb anesthetic gases. However, due to the uneven pore size distribution of the activated carbon filter cartridges, the adsorption efficiency is not particularly high, and especially when high-concentration anesthetic gases are treated, the phenomenon of adsorption saturation easily occurs.

[0004] Therefore, it is necessary to propose an intelligent anesthetic waste gas treatment system and method to solve the above problems. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide an intelligent anesthetic waste gas treatment system and method to solve the problem of low adsorption efficiency of anesthetic gases due to the uneven pore size distribution of activated carbon filter cartridges.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows: In a first aspect, an intelligent anesthetic waste gas treatment system is proposed, comprising: Two processor housings that are spliced together, a treatment chamber is formed between the two processor housings, the treatment chamber is divided into two sliding cavities by a partition, two filter cartridge sleeves are arranged in each sliding cavity, an activated carbon filter cartridge is embedded and installed in the filter cartridge sleeve, and the activated carbon filter cartridge is used for adsorbing anesthetic waste gas; A transfer pipeline arranged below the processor housing for anesthetic waste gas to enter; An exhaust pipe arranged above the processor housing for exhaust gas after purification to be discharged; An intelligent control unit for monitoring gas concentration and controlling the processing mode of the system; Wherein, the activated carbon filter cartridge is provided with a man-made micro-pore structure, the man-made micro-pore structure comprises vertical holes and a plurality of inclined holes, the vertical holes are vertical micro-holes penetrating the upper and lower surfaces of the activated carbon filter cartridge, and the inclined holes are inclined micro-holes and communicate with the vertical holes. The surface of the activated carbon filter cartridge is also coated with a metal oxide coating, and the metal oxide coating is coated on the surface of the activated carbon filter cartridge using chemical vapor deposition or physical vapor deposition technology.

[0007] Optionally, the vertical hole and the inclined hole have a diameter ranging from 2 to 50 nm; and the metal oxide coating uses titanium tetraisopropoxide or manganese nitrate as a precursor.

[0008] Optionally, the bottom of the exhaust pipe is connected to a first transfer box, the bottom of the first transfer box is connected to two first connecting pipes, and the two first connecting pipes are respectively connected to the interiors of two filter core sleeves. The upper end of the transfer pipeline is connected to a second transfer box, the upper end of the second transfer box is connected to two second connecting pipes, and the two second connecting pipes are respectively connected to the interiors of two corresponding filter core sleeves. The position where the first connecting pipe is connected to the filter core sleeve corresponds to the position directly above where the second connecting pipe is connected to the filter core sleeve, and the side of the transfer pipeline is connected to a first exhaust pipe for the anesthetic waste gas to enter.

[0009] Optionally, the intelligent control unit includes a pollution monitoring sensor, a first electromagnetic valve, and a second electromagnetic valve; the first electromagnetic valve is arranged in the exhaust pipe, the pollution monitoring sensor is arranged in the first transfer box, the side of the first transfer box is connected to a reflux pipeline, the lower end of the reflux pipeline is connected to the side of the second transfer box, and the second electromagnetic valve and a first check valve are arranged in the reflux pipeline.

[0010] Optionally, one side of the processor shell is provided with a rectangular opening, and the other side is provided with an expansion hole; the outer side of the processor shell is provided with an electric cylinder, the expansion section of the electric cylinder extends into the processor shell through the expansion hole, and is movably attached to the outer side of the filter core sleeve.

[0011] Optionally, the bottom of the processor shell is provided with a cooling box for storing cooling liquid; the first exhaust pipe, the second connecting pipe, the second transfer box, and the transfer pipeline are located in the cooling box, the end of the first exhaust pipe extends out of the cooling box, a second exhaust pipe is arranged in the cooling box, the second exhaust pipe has a back-and-forth bending pipeline structure, one end of the second exhaust pipe is connected to the transfer pipeline, and the other end extends out of the cooling box, and the second exhaust pipe and the first exhaust pipe are respectively provided with a third electromagnetic valve and a fourth electromagnetic valve.

[0012] Optionally, the ends of the second exhaust pipe and the first exhaust pipe extending out of the cooling box are connected to a pre-treatment box, the pre-treatment box is provided with a second temperature sensor, and the pre-treatment box is further provided with a total connecting pipe for connecting the anesthetic gas discharge end of an anesthetic machine.

[0013] Optionally, a sleeve is provided around the rectangular opening, and an outwardly protruding arc-shaped convex edge is provided on the outer circumference of the end of the sleeve. A storage bag is fitted on the arc-shaped convex edge, and the opening of the storage bag has an elastic shrink band.

[0014] Optionally, the activated carbon filter element in the filter element sleeve is configured as multiple pieces and distributed along the height direction of the filter element sleeve, with adjacent activated carbon filter elements forming a processing chamber; at least one branch pipe is provided on the return pipe, and the branch pipe is connected to one of the processing chambers through a connection hole on the processor housing; a fifth solenoid valve and a second one-way valve are provided in the branch pipe; a round hole is provided on the filter element sleeve, and a through hole is provided on the partition plate, with the processing chambers at the same horizontal position in the two sliding chambers connected through the through hole and the round hole.

[0015] Secondly, a method for intelligent treatment of anesthetic waste gas is proposed, employing the intelligent anesthetic waste gas treatment system described in the first aspect, including the following steps: S1. Detect the inlet temperature of the anesthetic waste gas and automatically select, based on the temperature threshold, whether to allow the waste gas to enter the cooling box through the second inlet pipe and then enter the transfer pipe, or to allow it to enter the transfer pipe directly through the first inlet pipe. S2. Real-time monitoring of the gas concentration after system processing. When the concentration detected by the sewage monitoring sensor is lower than the first threshold, the first solenoid valve is opened for direct discharge. When the monitored concentration is between the first and second thresholds, the first solenoid valve is closed and the fifth solenoid valve in the appropriate branch pipeline is opened for precise reflux reprocessing. When the monitored concentration is in a higher range, the first solenoid valve is closed and the second solenoid valve is opened for main reflux reprocessing, so that the gas returns to the second transfer box through the reflux pipeline. S3. When the monitored concentration continuously exceeds the maintenance threshold, the saturated activated carbon filter element replacement operation will be automatically triggered and executed.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) In this invention, an improved activated carbon filter element and a technology for coating the surface of the activated carbon filter element with a metal oxide coating are provided, which can not only improve the adsorption effect of the activated carbon filter element on anesthetic gas, but also ensure that the gas throughput is not affected. (2) In this invention, by setting a pretreatment box, a second temperature sensor, a second discharge pipe and a first discharge pipe, the cooling pretreatment of the anesthetic waste gas before it is purified can be achieved, so as to fully ensure the filtration effect of the activated carbon filter on the anesthetic waste gas. (3) In this invention, the purpose of automatically replacing activated carbon filter element is achieved by the coordinated setting of electric cylinder, filter element sleeve, sewage monitoring sensor and rectangular port, which reduces medical and nursing work and reduces the risks that may occur during surgery. (4) In this invention, an SGA-700 intelligent anesthetic gas sensor module is set in the first transfer box to monitor the concentration of anesthetic waste gas in real time. When the concentration exceeds the set threshold, the first solenoid valve and the second solenoid valve are switched by the microcontroller to realize the direct discharge or secondary purification of the gas after recirculation. (5) In this invention, a sleeve and a storage bag are set around the rectangular opening to automatically collect the adsorbed saturated activated carbon filter element, avoid the escape of anesthetic waste gas, reduce environmental pollution, and improve the safety of operation. (6) In this invention, the emission standards of anesthetic waste gas can be divided into three levels. Based on the monitoring results, a suitable treatment scheme can be selected to ensure that the emitted gas meets environmental protection requirements. Multi-level purification treatment can be achieved through return pipes and branch pipes to improve purification efficiency and reduce the load on a single activated carbon filter element. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the intelligent treatment system for anesthetic waste gas from one perspective in an embodiment of the present invention. Figure 2 This is a schematic diagram of the intelligent treatment system for anesthetic waste gas from another perspective in an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the intelligent anesthetic waste gas treatment system in an embodiment of the present invention. Figure 4 This is a schematic diagram of the internal structure of the intelligent anesthetic waste gas treatment system in an embodiment of the present invention from another perspective; Figure 5 This is a schematic diagram of the structure of the second discharge pipe in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the filter sleeve and activated carbon filter element in an embodiment of the present invention; Figure 7 This is a schematic diagram of the processor housing in an embodiment of the present invention; Figure 8 This is a cross-sectional view of the intelligent anesthetic waste gas treatment system in Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of the structure when the filter sleeve is removed in Embodiment 2 of the present invention; Figure 10 yes Figure 8 A magnified schematic diagram of the partial structure at point A in the middle; Figure 11 This is a schematic diagram of the preprocessing box structure in an embodiment of the present invention; Figure 12 This is a schematic diagram of the intelligent treatment system for anesthetic waste gas in Embodiment 3 of the present invention; Figure 13 yes Figure 12 A magnified schematic diagram of the local structure at point B; Figure 14 This is a schematic diagram of the structure of the activated carbon filter element in an embodiment of the present invention; Figure 15 This is a schematic diagram of a single set of artificial microporous structures in an embodiment of the present invention; The components include: 1. Processor housing; 2. Cooling box; 3. First inlet pipe; 4. Fixed side; 5. Discharge pipe; 6. First transfer box; 7. First connecting pipe; 8. Partition plate; 9. Filter sleeve; 10. Return pipe; 11. Support plate; 12. Electric cylinder; 13. First solenoid valve; 14. Sewage monitoring sensor; 15. Second solenoid valve; 16. Activated carbon filter; 17. Second connecting pipe; 18. Second transfer box; 19. Transfer pipe; 20. First check valve; 21. Second inlet pipe; 2. Telescopic hole; 23. Rectangular opening; 24. Tube sleeve; 25. Storage bag; 26. First temperature sensor; 27. Arc-shaped convex edge; 28. Third solenoid valve; 29. ​​Fourth solenoid valve; 30. Pretreatment box; 31. Second temperature sensor; 32. Main connecting pipe; 33. Processing chamber; 34. Through hole; 35. Branch pipe; 36. Fifth solenoid valve; 37. Second one-way valve; 38. Connection hole; 39. Round hole; 40. Sealing gasket; 41. Artificial microporous structure; 42. Vertical hole; 43. Angled hole. Detailed Implementation

[0018] This invention provides, for example Figures 1-13 The present invention discloses an intelligent system and method for treating anesthetic waste gas, which can effectively adsorb volatile organic compounds (VOCs) such as sevoflurane and isoflurane from anesthetic waste gas. These harmful gases are adsorbed onto the surface of activated carbon, thereby achieving a purification effect. The invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention and therefore only showing the components relevant to the invention.

[0019] Example 1, Reference Figures 1 to 4As shown, the intelligent anesthetic waste gas treatment system includes a processor housing 1. Two processor housings 1 are provided, joined vertically. Each processor housing 1 has a fixed edge 4 fixedly connected to its adjacent side, secured by bolts and nuts. A treatment chamber is formed between the two processor housings 1. A partition 8 is fixedly installed in the middle of each processor housing 1, dividing the treatment chamber into two sliding chambers. Each sliding chamber contains two filter sleeves 9, with an activated carbon filter element 16 embedded within each filter sleeve 9. An exhaust pipe 5 is located above the processor housing 1, and a first transfer box 6 is connected to the bottom of the exhaust pipe 5. Two first connecting pipes 7 are connected to the bottom of the first transfer box 6, respectively communicating with the interior of two of the filter sleeves 9. A transfer pipe 19 is provided at the bottom of the body 1. A second transfer box 18 is connected to the upper end of the transfer pipe 19. Two second connecting pipes 17 are connected to the upper end of the second transfer box 18. The two second connecting pipes 17 are respectively connected to the interior of two corresponding filter sleeves 9. The position of the first connecting pipe 7 connected to the filter sleeve 9 corresponds to the position of the second connecting pipe 17 connected to the filter sleeve 9 directly above it. A first discharge pipe 3 is connected to the side of the transfer pipe 19. The first discharge pipe 3 is used to allow anesthetic waste gas to enter. The anesthetic waste gas enters the filter sleeve 9 through the first discharge pipe 3, the transfer pipe 19, the second transfer box 18, and the second connecting pipe 17 in sequence. The activated carbon filter 16 adsorbs and removes the volatile organic compounds in the anesthetic waste gas. The treated gas is discharged through the first connecting pipe 7, the first transfer box 6, and the discharge pipe 5 in sequence.

[0020] Furthermore, a first solenoid valve 13 is installed in the discharge pipe 5, and a sewage monitoring sensor 14 is installed in the first transfer box 6. The sewage monitoring sensor 14 uses an SGA-700 intelligent anesthetic gas sensor module to monitor the concentration of anesthetic gases, such as sevoflurane and isoflurane. A return pipe 10 is connected to the side of the first transfer box 6, and the lower end of the return pipe 10 is connected to the side of the second transfer box 18. A second solenoid valve 15 and a first one-way valve 20 are installed in the return pipe 10. The first one-way valve 20 allows gas in the return pipe 10 to enter in one direction. In the second transfer box 18, the anesthetic gas in the second transfer box 18 is prevented from being directly discharged through the return pipe 10. When the sewage monitoring sensor 14 detects that the concentration of anesthetic gas still exceeds the set threshold, it proves that the anesthetic gas treatment does not meet the emission standards. At this time, the first solenoid valve 13 is closed and the second solenoid valve 15 is opened. The anesthetic gas that is about to be discharged into the first transfer box 6 will be guided into the return pipe 10 and return to the second transfer box 18. The anesthetic gas will be treated again by the activated carbon filter element 16 and then tested to see if it is qualified. It can be discharged after it is qualified.

[0021] In this invention, the wastewater monitoring sensor 14, the first solenoid valve 13, and the second solenoid valve 15 are connected via an STC89C51 microcontroller. The output of the wastewater monitoring sensor 14 is connected to the input of the microcontroller, and the inputs of the first solenoid valve 13 and the second solenoid valve 15 are connected to the microcontroller. When the wastewater monitoring sensor 14 detects the concentration data of the anesthetic gas, it feeds this information back to the microcontroller. The microcontroller then controls the corresponding first solenoid valve 13 or second solenoid valve 15 to start, enabling direct discharge of the gas or secondary purification after recirculation, which is convenient and practical. The aforementioned wastewater monitoring sensor 14, first solenoid valve 13, second solenoid valve 15, and microcontroller together constitute an intelligent control unit to monitor gas concentration and control the system's processing mode.

[0022] refer to Figures 4 to 8 As shown in the figure, a rectangular opening 23 is provided on one side of the processor housing 1 and a telescopic hole 22 is provided on the other side. A support plate 11 is fixedly installed on the outer surface of the processor housing 1. The support plate 11 is L-shaped. The end of the support plate 11 away from the processor housing 1 is fixedly connected to an electric cylinder 12. The electric cylinder 12 is arranged horizontally and includes a fixed section and a telescopic section. The telescopic section of the electric cylinder 12 extends movably into the processor housing 1 from the telescopic hole 22 and movably fits against the outer side of the filter sleeve 9.

[0023] In actual use, if the threshold for gas emission exceeds the standard three times in a row, it is highly likely that the activated carbon filter element 16 is oversaturated with anesthetic gas. At this time, the filter element sleeve 9 can be moved out of the station by starting the electric cylinder 12. One of the filter element sleeves 9 that is oversaturated with anesthetic gas will be discharged from the rectangular opening 23. The other new filter element sleeve 9 and the activated carbon filter element 16 will be moved to the position corresponding to the first connecting pipe 7 and the second connecting pipe 17. This does not affect the continuous use of the intelligent anesthetic waste gas treatment system, does not require shutdown, and can automatically switch the activated carbon filter element 16. It is particularly suitable for use during surgery, without the risk of safety accidents and interruption of surgery due to the activated carbon filter element 16 being oversaturated with anesthetic gas.

[0024] It should be noted that the two filter sleeves 9 are arranged along the length of the electric cylinder 12, and the two filter sleeves 9 are movable and fitted together. One filter sleeve 9 is located between the first connecting pipe 7 and the second connecting pipe 17. The anesthetic gas entering through the second connecting pipe 17 enters the filter sleeve 9 and is adsorbed and purified by the activated carbon filter 16 in the filter sleeve 9. The other filter sleeve 9 is a spare. The spare filter sleeve 9 is located close to the electric cylinder 12. The upper and lower surfaces of the filter sleeve 9 are movable and fitted with the upper and lower inner walls of the processor housing 1, respectively, and are kept sealed to prevent the anesthetic gas from escaping. In practice, sealing can be achieved by attaching rubber sealing rings or other methods to the upper and lower surfaces of the filter sleeve 9. This is a conventional technology and will not be described in detail here.

[0025] In summary, the present invention achieves the purpose of automatically replacing the activated carbon filter element 16 by combining the electric cylinder 12, filter sleeve 9, sewage monitoring sensor 14 and rectangular port 23, thereby reducing medical and nursing work and reducing the risks that may occur during surgery.

[0026] Based on practical experience, the temperature of anesthetic exhaust gas is generally not too high. However, in certain situations, such as the operation of equipment in the operating room or specific anesthesia procedures, the exhaust gas temperature may rise. For example, in some operating rooms, the temperature of anesthetic exhaust gas may reach around 40°C. At lower temperatures, the thermal motion of molecules is relatively weak, and the adsorption effect of activated carbon on adsorbate molecules is more significant. However, as the temperature rises, the thermal motion of molecules intensifies, and they have higher energy to overcome the adsorption force on the surface of activated carbon. This makes it more difficult for adsorbate molecules to be stably adsorbed on the surface of activated carbon, resulting in a gradual decrease in the amount of adsorption.

[0027] refer to Figure 11 As shown in the diagram, a cooling box 2 is provided at the bottom of the processor housing 1. The cooling box 2 is used to store coolant, which can be either water or silicone oil. The first drain pipe 3, the second connecting pipe 17, the second transfer box 18, and the transfer pipe 19 are all located in the cooling box 2, and the end of the first drain pipe 3 extends out of the cooling box 2. A second drain pipe 21 is also provided in the cooling box 2. The second drain pipe 21 has a pipe structure with back and forth bends. One end of the second drain pipe 21 is connected to the transfer pipe 19, and the other end of the second drain pipe 21 extends out of the cooling box 2. A third solenoid valve 28 and a fourth solenoid valve 29 are respectively provided on the second drain pipe 21 and the first drain pipe 3. The ends of the second drain pipe 21 and the first drain pipe 3 that extend out of the cooling box 2 are connected to a preprocessing box 30. A second temperature sensor 31 is provided in the preprocessing box 30. A main connecting pipe 32 is also provided, which is used to connect to the anesthetic waste gas discharge end of the anesthetic machine. The anesthetic waste gas first enters the pretreatment box 30. The second temperature sensor 31 detects the temperature of the anesthetic waste gas. If the temperature exceeds 35°C, the third solenoid valve 28 is opened, and the anesthetic waste gas enters the transfer pipe 19 through the second discharge pipe 21. The anesthetic waste gas and the coolant in the cooling box 2 are cooled by heat exchange through the wall structure of the second discharge pipe 21. The cooled anesthetic waste gas enters the activated carbon filter 16 for purification treatment, ensuring the adsorption effect of the activated carbon filter 16 on the anesthetic waste gas. If the temperature is lower than 35°C, the fourth solenoid valve 29 is opened, so that the anesthetic waste gas directly enters the transfer pipe 19 through the first discharge pipe 3. The first discharge pipe 3 is a straight pipe, which allows the anesthetic waste gas to quickly enter the activated carbon filter 16 for purification treatment, improving the purification efficiency.

[0028] It should be noted that the cooling tank 2 is also equipped with a first temperature sensor 26, which is used to monitor the temperature of the coolant. When the temperature of the coolant is too high, it is necessary to cool the coolant down in time or replace it with new coolant.

[0029] In summary, by setting up the pretreatment box 30, the second temperature sensor 31, the second discharge pipe 21 and the first discharge pipe 3 in this invention, the cooling pretreatment of anesthetic waste gas before purification can be achieved, which fully ensures the filtration effect of the activated carbon filter element 16 on the anesthetic waste gas. It should be noted that the third solenoid valve 28, the fourth solenoid valve 29 and the second temperature sensor 31 in this invention are also connected and controlled by a microcontroller, which will not be elaborated here.

[0030] It should also be noted that in this invention, the anesthetic waste gas can enter the intelligent anesthetic waste gas treatment system by the power of its self-exhaust, without the need for a power suction pump or other structures. If required by the usage conditions of the scenario, those skilled in the art can also connect a commercially available small suction pump or other structures to the main connecting pipe 32, which will not be elaborated here.

[0031] refer to Figure 14 and Figure 15 As shown, the present invention also improves the activated carbon filter element 16, thereby enhancing the adsorption effect on anesthetic waste gases such as sevoflurane and isoflurane, while ensuring that the pore throughput of the activated carbon filter element 16 is not affected.

[0032] The activated carbon filter element 16 is provided with an artificial microporous structure 41, which includes vertical pores 42 and oblique pores 43. The vertical pores 42 are micropores that vertically penetrate the upper and lower surfaces of the activated carbon filter element 16, with a pore size of 2-50 nm. Micropores are the main sites for activated carbon adsorption, providing a large specific surface area, and have the best adsorption effect on small molecule pollutants such as sevoflurane and isoflurane. By increasing the number of micropores and the specific surface area, the adsorption capacity of activated carbon for small molecule anesthetic gases can be significantly improved. The oblique pores 43 are inclined micropores that are formed from the upper surface of the activated carbon filter element 16. Furthermore, multiple inclined holes 43 are provided, and the multiple inclined holes 43 are distributed at equal intervals along the height direction of the vertical hole 42. The upper end of the inclined hole 43 is inclined away from the axis of the vertical hole 42. The inclined hole 43 is connected to the vertical hole 42. Multiple sets of artificial microporous structures 41 are opened on the activated carbon filter element 16. When the anesthetic waste gas enters from the lower surface of the activated carbon filter element 16, the anesthetic gas enters from the bottom of the vertical hole 42 and is then evenly dispersed into the inclined hole 43. This can increase the specific surface area and make the anesthetic gas flow more smoothly, thereby improving the adsorption efficiency of the activated carbon filter element 16 for the anesthetic gas.

[0033] Furthermore, the activated carbon filter element 16 in this invention is also coated with a metal oxide coating. The metal oxide coating is applied to the surface of the activated carbon filter element 16 using chemical vapor deposition or physical vapor deposition technology. This metal oxide coating can not only maintain the pore structure of the activated carbon filter element 16, but also ensure that the permeability of anesthetic gas is not affected.

[0034] More importantly, since the activated carbon filter element 16 is provided with vertical holes 42 and oblique holes 43, the pore diameters of the vertical holes 42 and oblique holes 43 are similar and both larger than the pore size of the activated carbon filter element 16 itself, which reduces the difficulty of coating the metal oxide coating.

[0035] The specific steps for applying a metal oxide coating using chemical vapor deposition are as follows: The first step is to select tetraisopropoxide titanium for titanium dioxide coating or manganese nitrate for manganese dioxide coating. Tetraisopropoxide titanium and manganese nitrate are metal oxide precursors. Prepare activated carbon filter element 16 and place activated carbon filter element 16 in the CVD reaction chamber to ensure that the surface of activated carbon filter element 16 is clean and free of impurities. The second step is temperature control, which involves heating the CVD reaction chamber to the precursor's reaction temperature: between 200℃ and 600℃. The third step is gas introduction, in which precursor gas and reactive gas (oxygen) are introduced into the CVD reaction chamber, and the gas flow rate and reaction time are controlled to ensure uniform deposition. The fourth step is coating formation. The precursor undergoes a chemical reaction on the surface of the activated carbon filter element 16 to form a metal oxide coating. The thickness of the coating is controlled by controlling the reaction time and gas flow rate according to actual needs. The fifth step is cooling and post-treatment. After the reaction is complete, the gas supply is turned off, and the CVD reaction chamber is allowed to cool naturally to room temperature. If necessary, post-treatments such as annealing can be performed to improve the crystallinity and adhesion of the coating.

[0036] In summary, the present invention provides an improved activated carbon filter element 16 and a technique for coating the surface of the activated carbon filter element 16 with a metal oxide coating, which can not only improve the adsorption effect of the activated carbon filter element 16 on anesthetic gases, but also ensure that the gas throughput is not affected.

[0037] Example 2, Reference Figures 8 to 10As shown, considering that when the activated carbon filter element 16 is removed for replacement, under high room temperature conditions, anesthetic waste gas molecules in the activated carbon filter element 16 can easily escape from the pores of the activated carbon filter element 16, causing pollution, a sleeve 24 is provided around the rectangular opening 23. The outer circumference of the end of the sleeve 24 is integrally provided with an outwardly protruding arc-shaped convex edge 27, and a storage bag 25 is fitted on the arc-shaped convex edge 27. The opening of the storage bag 25 has an elastic contraction band. When the electric cylinder 12 pushes the filter element sleeve 9... When discharged from the rectangular opening 23, the filter cartridge 9 and the collection bag 25 are automatically detached from the tube sleeve 24 due to gravity. The collection bag 25 is automatically closed by the elastic contraction band at its opening. When not in use, a new collection bag 25 can be placed on the tube sleeve 24. The filter cartridge 9 and activated carbon filter 16 are replaced by automatic ejection. The automatic collection and closing method prevents the anesthetic exhaust gas molecules from escaping from the pores of the activated carbon filter 16, which is both environmentally friendly and safe.

[0038] Example 3, Reference Figure 12 and Figure 13 As shown, in order to further improve the adsorption effect of activated carbon filter element 16 on anesthetic gas, the activated carbon filter element 16 in filter element sleeve 9 is set as three pieces. The three activated carbon filter elements 16 are distributed at equal distances along the height direction of filter element sleeve 9. The upper and lower adjacent activated carbon filter elements 16 form a processing chamber 33. Two branch pipes 35 are set in the middle of the return pipe 10. A connection hole 38 is set on the processor housing 1. The branch pipes 35 are connected between the connection hole 38 and the return pipe 10. A fifth solenoid valve 36 and a second one-way valve 37 are set in the branch pipes 35. The second one-way valve 37 is used to prevent anesthetic gas from flowing back into the return pipe 10. A round hole 39 is set on the filter element sleeve 9. A through hole 34 is set on the partition plate 8. The processing chambers 33 at the same horizontal position in the two sliding chambers are connected through the through hole 34 and the round hole 39. The connection hole 38 is connected to a round hole 39 near the return pipe 10.

[0039] Example 4: This invention not only provides an intelligent system for treating anesthetic waste gas, but also a corresponding intelligent method for treating anesthetic waste gas. The method specifically includes the following steps: S1: Detect the inlet temperature of the anesthetic waste gas and automatically select, based on the temperature threshold, whether to allow the waste gas to enter the cooling box 2 through the second discharge pipe 21 and then enter the transfer pipe 19, or to allow it to enter the transfer pipe 19 directly through the first discharge pipe 3. S2: Real-time monitoring of the gas concentration after system processing. When the concentration detected by the sewage monitoring sensor 14 is lower than the first threshold, the first solenoid valve 13 is opened for direct discharge. When the monitored concentration is between the first and second thresholds, the first solenoid valve 13 is closed and the fifth solenoid valve 36 in the appropriate branch pipe 35 is opened for precise reflux reprocessing. When the monitored concentration is in a higher range, the first solenoid valve 13 is closed and the second solenoid valve 15 is opened for main reflux reprocessing, so that the gas returns to the second transfer box 18 through the reflux pipe 10. S3: When the monitored concentration continues to exceed the maintenance threshold, the replacement operation of the saturated activated carbon filter element 16 will be automatically triggered and executed.

[0040] In one specific implementation, the emission standards for anesthetic waste gas are divided into three levels: The first-class emission standard stipulates that the concentrations of the main components in anesthetic exhaust gas are: isoflurane and sevoflurane, which are below 0.1 ppm, and nitrous oxide, which is below 5 ppm. The secondary standard stipulates that the concentrations of the main components in anesthetic exhaust gas are isoflurane and sevoflurane below 1 ppm, and the concentration of nitrous oxide below 10 ppm. The third-level standard stipulates that the concentrations of the main components in anesthetic exhaust gas are isoflurane and sevoflurane below 5 ppm, and the concentration of nitrous oxide below 50 ppm.

[0041] Choose the appropriate emission standard according to the usage requirements. For example, if it is within the first-level standard, it can be discharged; if it is outside the first-level emission standard, it needs to be adsorbed and treated again.

[0042] When the sewage monitoring sensor 14 detects that the concentration of isoflurane and sevoflurane in the anesthetic waste gas is 0.01 ppm and the concentration of nitrous oxide is less than 0.5 ppm, which is within the first-level standard, the microcontroller controls the first solenoid valve 13 to open and the second solenoid valve 15 to close, so that the treated gas is directly discharged from the discharge pipe 5. When the discharge monitoring sensor 14 detects that the concentration of isoflurane and sevoflurane in the anesthetic waste gas is 0.5 ppm and the concentration of nitrous oxide is less than 7 ppm, which is within the secondary standard, the microcontroller controls the first solenoid valve 13 to close and the second solenoid valve 15 and the upper fifth solenoid valve 36 to open. This allows the treated gas to pass through the return pipe 10, the upper branch pipe 35, the connecting hole 38, and the round hole 39 in sequence before entering the treatment chamber 33. The treated gas then enters the adjacent treatment chamber 33 through the through hole 34 on the partition plate 8. It is then subjected to adsorption and purification again by the activated carbon filter element 16 in the two filter element sleeves 9. Usually, this second adsorption and purification is sufficient to meet the emission standards. After meeting the emission standards, the gas is discharged through the discharge pipe 5. When the sewage monitoring sensor 14 detects that the concentration of isoflurane and sevoflurane in the anesthetic waste gas is 2 ppm and the concentration of nitrous oxide is less than 15 ppm, which is within the third-level standard, the microcontroller controls the first solenoid valve 13 to close and the second solenoid valve 15 and the fifth solenoid valve 36 below to open. The treated gas enters the treatment chamber 33 through the return pipe 10, the branch pipe 35 below, the connection hole 38, and the round hole 39 in sequence. The treated gas then enters the adjacent treatment chamber 33 through the through hole 34 on the partition plate 8. It is then adsorbed and purified again by the activated carbon filter element 16 in the two filter element sleeves 9. The secondary adsorption and purification usually meets the emission standards. After meeting the emission standards, the gas is discharged through the discharge pipe 5. When the discharge monitoring sensor 14 detects that the concentration of isoflurane and sevoflurane in the anesthetic waste gas is 8 ppm and the concentration of nitrous oxide is less than 70 ppm, which is outside the third-level standard, the microcontroller controls the first solenoid valve 13 and the fifth solenoid valve 36 to close and the second solenoid valve 15 to open. This allows the treated gas to pass through the return pipe 10 and the second transfer box 18 in sequence before being discharged into the filter sleeve 9. After the anesthetic waste gas is purified by adsorption three times, it is discharged after passing the monitoring again.

[0043] In summary, this invention, based on the configuration of a return pipe 10, a branch pipe 35, a sewage monitoring sensor 14, and three activated carbon filter elements 16, can selectively transport the anesthetic waste gas to the corresponding treatment chamber 33 for further purification based on the concentration of the anesthetic waste gas to be emitted. This maximizes efficiency, meets emission standards, and reduces the load on the individual activated carbon filter element 16 for adsorbing anesthetic waste gas. This allows the three activated carbon filter elements 16 to be fully utilized before replacement without affecting the adsorption efficiency.

[0044] It should be noted that a sealing gasket 40 is fixedly connected to the surface of the filter sleeve 9. The sealing gasket 40 is set around the round hole 39. The sealing gasket 40 is used to seal the connection of the round hole 39 to prevent the anesthetic gas from escaping. This is a common sealing technology and will not be described in detail here.

[0045] The activated carbon filter element 16 provided in this invention replaces the traditional method of using a stacked activated carbon filter element 16, which causes the anesthetic gas to be saturated by the first activated carbon filter element 16, thus affecting the efficiency of the anesthetic gas being discharged to the next stage. The activated carbon filter element 16 in this invention has a significantly better adsorption effect on anesthetic gas.

[0046] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many improvements and modifications under the guidance of the present invention without departing from the spirit and scope of the claims. These improvements and modifications should also be considered within the scope of protection of the present invention.

[0047] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

Claims

1. An intelligent system for treating anesthetic waste gas, characterized in that, include: Two processor housings are joined together, forming a processing chamber between them. The processing chamber is divided into two sliding chambers by a partition. Each sliding chamber is provided with two filter sleeves, in which activated carbon filter elements are embedded. The activated carbon filter elements are used to adsorb anesthetic waste gas. The transfer pipe located below the processor housing is used to allow anesthetic waste gas to enter; The exhaust pipe located above the processor housing is used to discharge the purified gas. Intelligent control unit, used to monitor gas concentration and control system processing mode; The activated carbon filter element is provided with an artificial microporous structure, which includes vertical holes and multiple oblique holes. The vertical holes are micropores that vertically penetrate the upper and lower surfaces of the activated carbon filter element, and the oblique holes are inclined micropores that communicate with the vertical holes. The surface of the activated carbon filter element is also coated with a metal oxide coating, which is applied to the surface of the activated carbon filter element using chemical vapor deposition or physical vapor deposition techniques.

2. The intelligent anesthetic waste gas treatment system according to claim 1, characterized in that, The diameter of both the vertical and oblique holes is between 2-50 nm; the metal oxide coating uses titanium tetraisopropoxide or manganese nitrate as a precursor.

3. The intelligent anesthetic waste gas treatment system according to claim 1, characterized in that, The bottom of the discharge pipe is connected to a first transfer box, and the bottom of the first transfer box is connected to two first connecting pipes, which are respectively connected to the inside of two of the filter cartridges. The upper end of the transfer pipe is connected to a second transfer box, and the upper end of the second transfer box is connected to two second connecting pipes, which are respectively connected to the interior of two corresponding filter cartridges. The position where the first connecting pipe connects to the filter sleeve corresponds directly above the position where the second connecting pipe connects to the filter sleeve. A first discharge pipe is provided on the side of the transfer pipe for the entry of anesthetic waste gas.

4. The intelligent anesthetic waste gas treatment system according to claim 3, characterized in that, The intelligent control unit includes a sewage monitoring sensor, a first solenoid valve, and a second solenoid valve; the discharge pipe is provided with the first solenoid valve, the first transfer box is provided with the sewage monitoring sensor, a return pipe is provided on the side of the first transfer box, the lower end of the return pipe is connected to the side of the second transfer box, and the return pipe is provided with the second solenoid valve and the first one-way valve.

5. The intelligent anesthetic waste gas treatment system according to claim 1, characterized in that, A rectangular opening is provided on one side of the processor housing, and a telescopic hole is provided on the other side; an electric cylinder is provided on the outer side of the processor housing, and the telescopic section of the electric cylinder extends through the telescopic hole into the processor housing and is movably fitted with the outer side of the filter element sleeve.

6. The intelligent anesthetic waste gas treatment system according to claim 3, characterized in that, A cooling box is provided at the bottom of the processor housing for storing coolant. The first drain pipe, the second connecting pipe, the second transfer box, and the transfer pipe are all located in the cooling box, and the end of the first drain pipe extends out of the cooling box. A second drain pipe is also provided in the cooling box. The second drain pipe has a pipe structure with back and forth bends. One end of the second drain pipe is connected to the transfer pipe, and the other end extends out of the cooling box. A third solenoid valve and a fourth solenoid valve are respectively provided on the second drain pipe and the first drain pipe.

7. The intelligent anesthetic waste gas treatment system according to claim 6, characterized in that, The second discharge pipe and the first discharge pipe are connected together to a pretreatment box at the ends extending outside the cooling box. A second temperature sensor is installed in the pretreatment box. A main connecting pipe is also installed on the pretreatment box. The main connecting pipe is used to connect to the anesthetic waste gas emission end of the anesthetic machine.

8. The intelligent anesthetic waste gas treatment system according to claim 5, characterized in that, A tube sleeve is provided around the rectangular opening, and an outwardly protruding arc-shaped convex edge is provided on the outer circumference of the end of the tube sleeve. A storage bag is fitted on the arc-shaped convex edge, and the opening of the storage bag has an elastic shrink band.

9. The intelligent anesthetic waste gas treatment system according to claim 4, characterized in that, The activated carbon filter element in the filter element sleeve is configured as multiple pieces and distributed along the height direction of the filter element sleeve, with a treatment chamber formed between adjacent activated carbon filter elements; The return pipe is provided with at least one branch pipe, which is connected to one of the processing chambers through a connection hole on the processor housing; a fifth solenoid valve and a second check valve are provided in the branch pipe; a round hole is provided on the filter sleeve, and a through hole is provided on the partition plate; the processing chambers at the same horizontal position in the two sliding chambers are connected through the through hole and the round hole.

10. A method for intelligent treatment of anesthetic waste gas, employing the intelligent anesthetic waste gas treatment system according to any one of claims 4-9, characterized in that, Includes the following steps: S1. Detect the inlet temperature of the anesthetic waste gas and automatically select, based on the temperature threshold, whether to allow the waste gas to enter the cooling box through the second inlet pipe and then enter the transfer pipe, or to allow it to enter the transfer pipe directly through the first inlet pipe. S2. Real-time monitoring of the gas concentration after system processing. When the concentration detected by the sewage monitoring sensor is lower than the first threshold, the first solenoid valve is opened for direct discharge. When the monitored concentration is between the first and second thresholds, the first solenoid valve is closed and the fifth solenoid valve in the appropriate branch pipeline is opened for precise reflux reprocessing. When the monitored concentration is in a higher range, the first solenoid valve is closed and the second solenoid valve is opened for main reflux reprocessing, so that the gas returns to the second transfer box through the reflux pipeline. S3. When the monitored concentration continuously exceeds the maintenance threshold, the saturated activated carbon filter element replacement operation will be automatically triggered and executed.

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