Multiple cigarette purification device

Abstract

The invention discloses a multiple cigarette purification device which comprises an outer shell, a filter cavity is formed in the outer shell, and the outer shell comprises an upper shell body and a lower shell body which are detachably connected; the mouth joint piece is detachably connected with one end of the upper shell; the connecting piece is connected with one end of the lower shell and is used for placing a cigarette; the filtering assembly is arranged in the filtering cavity, the filtering assembly comprises an aluminum-based organic metal framework, a zeolite-graphene oxide composite film and tea polyphenol-cellulose nanofibers, and the preparation method of the filtering assembly is further included. The device is simple in structure and convenient to use, and comprehensive and efficient removal of various harmful substances in cigarette smoke is achieved through the synergistic effect of the filtering assembly; meanwhile, due to the detachable outer shell, replacement of the filtering assembly and cleaning of the outer shell can be facilitated, sanitation and the use effect of the device are ensured, and the use experience of a user is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cigarette filters, in particular to a multiple cigarette purification device. Background Art

[0002] In recent years, with the improvement of public health awareness, the design and development of cigarette filter devices have received increasing attention. Cigarette filters in the prior art mostly use a single material or a simple composite structure, and their filtration efficiency and functionality have significant limitations. Studies have shown that cigarette smoke contains a variety of harmful substances such as nicotine, tar, PM2.5 particles, heavy metal ions, free radicals and nitrosamines, which have long-term cumulative effects on the human respiratory system and carcinogenic risks. However, traditional filter materials (such as cellulose acetate, activated carbon, etc.) can often only passively adsorb specific types of pollutants, and it is difficult to achieve the synergistic removal of multi-component harmful substances. For example, although activated carbon fiber has a certain adsorption capacity, its ability to degrade small molecule carcinogens such as nitrosamines is insufficient; and the metal mesh structure that relies solely on physical interception is prone to pore blockage due to tar adhesion, shortening the service life.

[0003] In addition, the structural design of existing filter devices generally has problems such as inconvenient maintenance and non-replaceable filter components, which leads to increased user costs and increased risk of secondary pollution. Especially in high-temperature flue gas environments, some filter materials are not chemically stable enough, and are prone to structural collapse or active site failure, further reducing filtration efficiency.

[0004] Therefore, a multiple cigarette purification device is proposed to solve the current shortcomings. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned technology and provide a multiple cigarette purification device.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is a multiple cigarette purification device, comprising:

[0007] An outer shell, wherein a filter chamber is disposed in the outer shell, and the outer shell comprises an upper shell and a lower shell that are detachably connected;

[0008] A mouthpiece, the mouthpiece being detachably connected to one end of the upper shell;

[0009] A connecting piece, connected to one end of the lower shell body, for accommodating cigarettes;

[0010] The filter component is arranged in the filter cavity, and the filter component comprises an aluminum-based organic metal framework, a zeolite-graphene oxide composite membrane and tea polyphenol-cellulose nanofibers.

[0011] As an improvement, it also includes activated carbon fiber felt, which is arranged in the mouthpiece and one end of which is in contact with the tea polyphenol-cellulose nanofiber.

[0012] As an improvement, the tea polyphenol-cellulose nanofibers, zeolite-graphene oxide composite membrane and aluminum-based organic metal framework are arranged in sequence from the filter cavity close to the mouthpiece to the other end.

[0013] As an improvement, the tea polyphenol-cellulose nanofiber is a porous honeycomb structure, the zeolite-graphene oxide composite membrane is a pleated form and is arranged radially along the filter cavity, and the aluminum-based organic metal framework is a honeycomb structure filled axially along the filter cavity.

[0014] As an improvement, the method for preparing the aluminum-based organic metal framework comprises the following steps:

[0015] S5.1, raw material pretreatment stage: select activated MIL-101AL powder, mix it with polydimethylsiloxane and silica sol in a mass ratio of 8-10:1:1 at 25-40°C with mechanical stirring to form a uniform slurry with a solid content of 45-50%;

[0016] S5.2, molding: using a twin-screw extruder at a pressure of 0.5-1.0 MPa, a mold temperature of 80-100° C., and an extrusion rate of 20-30 cm / min to prepare a honeycomb structure with a pore size of 0.5-1.0 mm and a wall thickness of 0.1-0.2 mm, and a porosity of 75-85% to obtain a molded body;

[0017] S5.3, post-treatment process: keep the molded body in a heat treatment furnace at 150-200°C for 1.5 hours, and then form a fluorinated silane hydrophobic layer on the surface by vapor deposition, with a coating thickness of 50-100 μm.

[0018] S5.4, Functional modification: amino functional groups were grafted onto the MOFs surface by atomic layer deposition, with the number of cycles ranging from 50 to 80 and the deposition rate controlled at Finally, a modified material with an amino group loading of 0.8 mmol / g was obtained.

[0019] As an improvement, the method for preparing the zeolite-graphene oxide composite membrane comprises the following steps:

[0020] S6.1, Raw material pretreatment:

[0021] S6.1.1 Select Y-type zeolite and ball-mill it to D50=1-5μm to obtain zeolite powder.

[0022] S6.1.2 Add graphene oxide to deionized water at a ratio of 1:100 mL, and disperse by ultrasonic for 3 hours to obtain a uniform dispersion with a concentration of 2 to 5 mg / mL;

[0023] S6.1.3 Mix the zeolite and the dispersion liquid in a mass ratio of 1:1 to 3, add 0.1% sodium dodecyl sulfate as a dispersant, stir magnetically for 30 minutes, add 1% sodium carboxymethyl cellulose as a binder, and continue stirring for 1 hour to form a stable slurry;

[0024] S6.2, Film forming process:

[0025] Pour the slurry onto the PTFE substrate and apply it with a scraper at a pressure of 50-80 N / cm to form a wet film with a thickness of 200-500 μm. After the film is formed, let it stand for 18 hours for preliminary curing.

[0026] S6.3 Drying and post-processing:

[0027] The wet film was transferred to a circulating air oven and dried in a 60°C oven for 6 to 8 hours until the moisture content was ≤5%. The peeled film was pressed by a double-roll pleating machine with a pleat density of 3 lines / cm. It was then irradiated with an ultraviolet lamp for 10 to 30 minutes to increase the tensile strength of the film to 12.5MPa.

[0028] S6.4. Functional modification:

[0029] The pleated composite membrane was immersed in a 1% chitosan solution for 10 seconds, taken out and dried at 50° C. to form a protective layer with a thickness of 5 to 10 μm.

[0030] As an improvement, the method for preparing the tea polyphenol-cellulose nanofibers comprises the following steps:

[0031] S7.1. Slurry mixing

[0032] The cellulose nanofibers, tea polyphenols and sodium chloride particles are mixed in a mass ratio of 3.5-4.5:1:15-18, and 0.15-0.25% of sodium dodecyl sulfate is added to form a slurry with a solid content of 10-15%;

[0033] S7.2, Pressing and Forming

[0034] The slurry is injected into a mold and pressed at a pressure of 7 to 9 MPa for 3 to 5 minutes, and then cured at room temperature for 24 hours and vacuum dried at 55°C for 6 to 8 hours to obtain a molded body;

[0035] S7.3, Dissolution and desalination

[0036] The formed body is immersed in deionized water for 3 hours to dissolve the sodium chloride particles and form a porous structure with a porosity of 80 to 85%;

[0037] S7.4. Functionalization

[0038] The method comprises spraying 1.2-1.8% sodium alginate solution, immersing in 18-2.2% CaCl2 solution for cross-linking for 9-11 minutes, and then spraying 2.5-3.5% ethyl cellulose ethanol solution, and drying at 55-65° C. to form a 2-5 μm anti-oxidation layer.

[0039] The advantages of the present invention compared with the prior art are:

[0040] 1. The filter component adopts an axial arrangement of aluminum-based organic metal framework, zeolite-graphene oxide composite membrane, and tea polyphenol-cellulose nanofibers to form a three-stage purification path of "physical adsorption-chemical interception-biodegradation". The aluminum-based organic metal framework is modified by high specific surface area and amino functional groups to achieve selective adsorption of nicotine, tar and aldehydes. The coordination effect of aluminum ions significantly improves the capture efficiency of nitrogen / oxygen compounds. The zeolite-graphene oxide composite membrane combines the molecular sieving effect of zeolite with the electrostatic adsorption of graphene oxide to achieve dual interception of PM2.5 particles and heavy metal ions. Tea polyphenol-cellulose nanofibers use the phenolic hydroxyl radical scavenging ability of tea polyphenols and the porous skeleton of cellulose nanofibers to directionally degrade carcinogens such as nitrosamines, avoiding the adsorption limitations of traditional activated carbon on small molecules.

[0041] 2. The activated carbon fiber felt in the mouthpiece achieves final adsorption of residual tar, VOCs and other gaseous pollutants through its high microporous structure, forming a "physical-chemical-biological-physical" four-layer protection closed loop.

[0042] 3. The device has a simple structure and is easy to use. Through the synergistic effect of the filtering components, it can achieve comprehensive and efficient removal of various harmful substances in cigarette smoke. At the same time, the detachable outer shell can facilitate the replacement of the filtering components and the cleaning of the outer shell, ensuring the hygiene and use effect of the device and improving the user experience. The device effectively solves the problems of low filtering efficiency, insufficient functionality, and inconvenient maintenance of traditional cigarette filters, providing users with a more efficient, convenient, and environmentally friendly cigarette filtering solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the use structure of a multiple cigarette purification device of the present invention.

[0044] Figure 2 It is a structural schematic diagram of a multiple cigarette purification device of the present invention.

[0045] Figure 3 It is an exploded view of a multiple cigarette purification device of the present invention.

[0046] Figure 4 It is a front view of a multiple cigarette purification device of the present invention.

[0047] Figure 5 yes Figure 4 Cross-sectional view at AA in the middle.

[0048] As shown in the figure:

[0049] 1. outer shell, 11. upper shell, 12. lower shell;

[0050] 2. Filter chamber, 3. Mouthpiece, 5. Connector,

[0051] 6. Filtration components, 61. Aluminum-based organic metal frameworks, 62. Zeolite-graphene oxide composite membranes, 63. Tea polyphenols-cellulose nanofibers;

[0052] 7. Activated carbon fiber felt, 8. Cigarettes. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiments of the invention clearer, the technical solution in the embodiments of the invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the invention. Obviously, the described embodiments are part of the embodiments of the invention, not all of the embodiments. Generally, the components of the embodiments of the invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0054] In the description of the embodiments of the invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed when in use, it is only for the convenience of describing the invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0055] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0056] In the description of the embodiments of the invention, "a plurality of" means at least two.

[0057] In the description of the embodiments of the invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0058] Embodiment 1

[0059] In conjunction with the accompanying drawings, a multiple cigarette purification device includes:

[0060] The outer shell 1 has a filter chamber 2 therein, and the outer shell 1 includes an upper shell 11 and a lower shell 12 that are detachably connected. The outer shell 1 serves as a protective structure of the device, and has a filter chamber 2 therein for accommodating a filter assembly 6.

[0061] In this embodiment, the outer shell 1 is composed of an upper shell 11 and a lower shell 12, and the two parts are connected in a detachable manner, which is convenient for maintenance and replacement of the internal filter assembly 6 and prolongs the service life of the device.

[0062] At the same time, after disassembling the outer shell 1, the user can thoroughly clean the filter cavity 2 to ensure the hygiene and use effect of the device.

[0063] A mouthpiece 3, wherein the mouthpiece 3 is detachably connected to one end of the upper shell 11;

[0064] In this embodiment, the mouthpiece 3 is plugged into the upper shell 11. The mouthpiece 3 is the part that the user directly contacts when using the cigarette purification device. It is used to provide a comfortable interface so that the user can easily inhale the purified smoke. To ensure the comfort of its use, the shape design of the mouthpiece 3 should be ergonomic. Specifically, the cross-section of the mouthpiece 3 is elliptical.

[0065] Similarly, the mouthpiece 3 can also be used as a connecting piece to achieve the use in conjunction with an external cigarette holder.

[0066] The connecting member 5 is connected to one end of the lower shell 12 and is used to fix and place the cigarette. The cigarette can be connected to the purification device to ensure that the smoke can smoothly enter the filter cavity 2 for purification.

[0067] In this embodiment, the connecting member 5 is integrally formed with the lower shell 12. The connecting member 5 is a hollow cylindrical structure adapted to the cigarette, and can firmly clamp the cigarette to prevent the cigarette from slipping or loosening during use.

[0068] The filter assembly 6 is arranged in the filter cavity 2 to achieve multiple filtering and purification of the smoke.

[0069] The filter assembly 6 includes an aluminum-based organic metal framework 61 , a zeolite-graphene oxide composite membrane 62 and tea polyphenol-cellulose nanofibers 63 .

[0070] Specifically, the tea polyphenol-cellulose nanofiber 63, the zeolite-graphene oxide composite membrane 62 and the aluminum-based organic metal framework 61 are arranged in sequence from the filter cavity 2 close to the mouthpiece 3 to the other end.

[0071] In this embodiment, the tea polyphenol-cellulose nanofiber 63 is a porous honeycomb structure, the zeolite-graphene oxide composite membrane 62 is a pleated form and is radially arranged along the filter cavity 2, and the aluminum-based organic metal framework 61 is a honeycomb structure filled axially along the filter cavity 2.

[0072] In a specific implementation, the aluminum-based organic metal framework 61 adsorbs nicotine, tar and aldehyde substances.

[0073] The zeolite-graphene oxide composite membrane 62 adsorbs and intercepts PM2.5 and heavy metals.

[0074] The tea polyphenol-cellulose nanofibers 63 neutralize free radicals and degrade nitrosamines.

[0075] During implementation, the aluminum-based organic metal framework 61 presents a honeycomb structure filled axially along the filter cavity 2, which increases the surface area of ​​the material. Nicotine, tar and aldehyde substances in the flue gas are adsorbed on its surface and pores through van der Waals forces. At the same time, the aluminum ions in the aluminum-based organic metal framework 61 can act as Lewis acids to coordinate with nitrogen-containing and oxygen-containing compounds (such as nicotine and aldehydes) in the flue gas to form stable chemical bonds.

[0076] Specifically, due to the porous structure and large specific surface area of ​​the aluminum-based organic metal framework 61, it can effectively adsorb various components in tar and reduce the amount of tar entering the respiratory tract. At the same time, it has a high adsorption capacity for nicotine and a fast adsorption rate, and can significantly reduce the nicotine content in the smoke in a short time.

[0077] In addition, the aluminum-based organic metal framework 61 can effectively capture these aldehyde substances through a chemical adsorption mechanism, thereby reducing their harm to health.

[0078] In this embodiment, the aluminum-based organic metal framework 61 can also provide more adsorption sites through the honeycomb structure, thereby improving the adsorption efficiency.

[0079] The zeolite-graphene oxide composite membrane 62 combines zeolite and graphene oxide to form a composite membrane structure with a synergistic effect. Specifically, zeolite provides a regular pore structure and adsorption sites, while graphene oxide provides a large specific surface area and abundant chemically active sites.

[0080] In this embodiment, the zeolite-graphene oxide composite membrane 62 is in a pleated form and is radially arranged along the filter cavity 2, which not only increases the surface area of ​​the membrane but also provides more adsorption and interception channels.

[0081] During implementation, the surface and pore structure of the zeolite-graphene oxide composite membrane 62 adsorb PM2.5 particles and heavy metal ions through van der Waals forces. At the same time, the oxygen-containing functional groups on the graphene oxide (such as hydroxyl, epoxy, and carboxyl) can act as coordinating groups to coordinate with heavy metal ions (such as lead, cadmium, and mercury) to form stable chemical bonds. The regular pore structure of the zeolite can be screened according to the size of the molecules to intercept larger particles of PM2.5. At the same time, the oxygen-containing functional groups on the surface of the graphene oxide can give the zeolite-graphene oxide composite membrane 62 a certain surface charge, thereby adsorbing PM2.5 particles and heavy metal ions with opposite charges through electrostatic action.

[0082] Specifically, the zeolite-graphene oxide composite membrane 62 can effectively adsorb and intercept PM2.5 particles through mechanisms such as physical adsorption, pore screening and electrostatic adsorption, thereby reducing the amount of PM2.5 particles entering the respiratory tract.

[0083] The zeolite-graphene oxide composite membrane 62 can effectively adsorb and intercept PM2.5 particles through mechanisms such as physical adsorption, pore screening and electrostatic adsorption, reducing the amount of PM2.5 particles entering the respiratory tract.

[0084] In a specific implementation, the flue gas initially filtered by the aluminum-based organic metal framework 61 continues to pass through the zeolite-graphene oxide composite membrane 62, where PM2.5 and heavy metals are captured by the wrinkled structure and adsorption sites of the membrane and are removed.

[0085] The tea polyphenol-cellulose nanofiber 63 is a porous honeycomb structure, which not only increases the surface area of ​​the material but also provides more reaction sites, thereby improving the efficiency of neutralizing free radicals and degrading nitrosamines.

[0086] Neutralization of free radicals:

[0087] The phenolic hydroxyl group (-OH) in tea polyphenols can provide electrons and undergo electron transfer reactions with free radicals, converting them into stable compounds. For example, tea polyphenols can react with superoxide anion free radicals (O2 - ), hydroxyl radicals (·OH), etc., converting them into harmless substances.

[0088] Tea polyphenols can also react with free radicals through a hydrogen atom transfer mechanism, converting them into stable free radical intermediates, which are then further converted into harmless compounds.

[0089] Tea polyphenols can also combine with metal ions (such as iron and copper) through chelation, inhibiting their catalytic reactions to generate free radicals, thereby indirectly reducing the generation of free radicals.

[0090] For the degradation of nitrosamines:

[0091] The antioxidant properties of tea polyphenols enable them to inhibit the formation of nitrosamines. For example, tea polyphenols can inhibit the reaction of nitrites with amines, thereby reducing the formation of nitrosamines.

[0092] At the same time, tea polyphenols can directly react with nitrosamines and degrade them into harmless compounds. For example, tea polyphenols can convert the nitroso (-N=O) in nitrosamines into hydroxylamine (-NHOH), thereby reducing its carcinogenicity.

[0093] The high specific surface area and abundant active sites of cellulose nanofibers provide a good carrier and reaction platform for tea polyphenols, enhancing the effect of tea polyphenols in degrading nitrosamines. Moreover, cellulose nanofibers can enrich nitrosamines on their surface through adsorption, thereby improving the degradation efficiency of tea polyphenols.

[0094] In this embodiment, the smoke further filtered by the zeolite-graphene oxide composite membrane 62 continues to pass through the tea polyphenol-cellulose nanofiber 63, and the free radicals and nitrosamines therein are neutralized and degraded by the porous structure and active sites of the fiber, and thus are removed.

[0095] It also includes an activated carbon fiber felt 7, which is arranged in the mouthpiece 3 and one end of which is in contact with the tea polyphenol-cellulose nanofiber 63. The activated carbon fiber felt 7 absorbs harmful gases such as tar and VOCs.

[0096] The activated carbon fiber felt 7 has a high specific surface area and rich microporous structure, which can provide great adsorption capacity. Due to its fibrous structure, the activated carbon fiber felt 7 has a faster adsorption rate and can effectively adsorb harmful gases in the flue gas in a short time. At the same time, the activated carbon fiber felt 7 has good gas permeability, and the felt structure allows the flue gas to pass freely, while ensuring full contact between the adsorbent material and the flue gas, thereby improving the adsorption efficiency.

[0097] In specific implementation,

[0098] 1. Flue gas entry and initial filtration

[0099] Cigarette Insertion and Smoke Generation:

[0100] The user inserts the cigarette into the connecting member 5, and the cigarette is firmly fixed in the internal structure of the connecting member 5 to ensure that smoke does not leak.

[0101] After the cigarette is lit, smoke begins to be generated and enters the device along the internal channel of the connecting member 5.

[0102] 2. Enter filter chamber 2:

[0103] The smoke first enters the filter chamber 2, and a variety of filter materials are arranged inside the filter chamber 2 to form a multi-level filter system.

[0104] 3. Preliminary adsorption and interception (aluminum-based organic metal framework 61):

[0105] After the smoke enters the filter cavity 2, it first contacts the aluminum-based organic metal framework 61, which is a honeycomb structure filled along the axial direction of the filter cavity 2 and has a high specific surface area and abundant adsorption sites.

[0106] Adsorption: Aluminum-based organic metal framework 61 effectively adsorbs nicotine, tar and aldehydes in smoke through physical adsorption (van der Waals force) and chemical adsorption (coordination) mechanisms.

[0107] Filtration effect: After the initial filtration of the aluminum-based organic metal framework 61, most of the nicotine, tar and aldehyde substances in the smoke are removed.

[0108] 4. Further filtration and interception (zeolite-graphene oxide composite membrane 62)

[0109] Adsorption and interception of PM2.5 and heavy metals:

[0110] The preliminarily filtered flue gas continues to pass through the zeolite-graphene oxide composite membrane 62. The composite membrane is in a pleated form, radially arranged along the filter cavity 2, and has a large specific surface area and abundant adsorption sites.

[0111] Adsorption: Zeolite-graphene oxide composite membrane 62 effectively adsorbs and intercepts PM2.5 and heavy metals in flue gas through physical adsorption (van der Waals force), chemical adsorption (coordination effect) and pore screening effect.

[0112] Filtration effect: After further filtration by the zeolite-graphene oxide composite membrane 62, PM2.5 and heavy metals in the flue gas are effectively removed.

[0113] 5. Deep purification (tea polyphenols-cellulose nanofiber 63)

[0114] Neutralize free radicals and degrade nitrosamines:

[0115] The further filtered smoke continues to pass through the tea polyphenol-cellulose nanofibers 63. The fibers are porous honeycomb structures with high specific surface area and abundant active sites.

[0116] Neutralize free radicals: Tea polyphenols-cellulose nanofibers 63 effectively neutralize free radicals in smoke (such as superoxide anion radicals and hydroxyl radicals) through electron transfer and hydrogen atom transfer mechanisms, reducing their damage to the respiratory system.

[0117] Degradation of nitrosamines: Tea polyphenols can also degrade nitrosamines (a strong carcinogen) in flue gas into harmless compounds through antioxidant and direct degradation effects, thereby reducing its carcinogenic risk.

[0118] Filtration effect: After deep purification by tea polyphenol-cellulose nanofiber 63, free radicals and nitrosamines in the flue gas are effectively neutralized and degraded.

[0119] 6. Final filtration and outlet (activated carbon fiber felt 7 and mouthpiece 3)

[0120] Adsorption of tar and VOCs:

[0121] The deeply purified flue gas enters the transition chamber 4, where it is buffered and further purified.

[0122] The smoke may be filtered again by the activated carbon fiber felt 7 in the transition chamber 4. The activated carbon fiber felt 7 is arranged in the mouthpiece 3 and has a high specific surface area and a rich microporous structure.

[0123] Adsorption: Activated carbon fiber felt 7 effectively absorbs harmful gases such as tar and VOCs in flue gas through physical adsorption and chemical adsorption mechanisms.

[0124] Filtration effect: After the final filtration of the activated carbon fiber felt 7, tar and VOCs in the flue gas are further removed.

[0125] 7. Smoke outlet:

[0126] After multiple filtering and purification processes, the smoke finally enters the user's mouth through the mouthpiece 3.

[0127] The method for preparing the aluminum-based organic metal framework comprises the following steps:

[0128] S5.1, raw material pretreatment stage: select activated MIL-101AL powder, mix it with polydimethylsiloxane and silica sol in a mass ratio of 8:1:1 at 25°C with mechanical stirring to form a uniform slurry with a solid content of 45%;

[0129] S5.2, molding: using a twin-screw extruder at a pressure of 0.5 MPa, a mold temperature of 80°C, and an extrusion rate of 20 cm / min to prepare a honeycomb structure with a pore size of 0.5 mm and a wall thickness of 0.1 mm, and the porosity is controlled at 75% to obtain a molded body;

[0130] S5.3, post-treatment process: the molded body is kept in a heat treatment furnace at 150°C for 1.5 hours, and then a fluorinated silane hydrophobic layer is formed on the surface by vapor deposition, with a coating thickness of 50 μm.

[0131] S5.4. Functional modification: amino functional groups were grafted onto the MOFs surface by atomic layer deposition, with 50 cycles and a deposition rate of Finally, a modified material with an amino group loading of 0.8 mmol / g was obtained.

[0132] In actual use, after being used for a period of time, the aluminum-based organic metal framework 61 can be soaked in anhydrous ethanol for about 5 hours, and then dried in an environment of 60° C. for 6 hours before being used again.

[0133] The preparation method of the zeolite-graphene oxide composite membrane comprises the following steps:

[0134] S6.1, Raw material pretreatment:

[0135] S6.1.1 Select Y-type zeolite and ball-mill it to D50=1μm to obtain zeolite powder.

[0136] S6.1.2 Add graphene oxide to deionized water at a ratio of 1:100 mL and disperse by ultrasonic for 3 hours to obtain a uniform dispersion with a concentration of 2 mg / mL;

[0137] S6.1.3 Mix the zeolite and the dispersion liquid in a mass ratio of 1:1, add 0.1% sodium dodecyl sulfate as a dispersant, stir magnetically for 30 minutes, add 1% sodium carboxymethyl cellulose as a binder, and continue stirring for 1 hour to form a stable slurry;

[0138] S6.2, Film forming process:

[0139] The slurry was poured onto a PTFE substrate and coated with a doctor blade at a doctor blade pressure of 50 N / cm to form a wet film with a thickness of 200 μm. After the film was formed, it was allowed to stand for 18 hours for preliminary curing.

[0140] S6.3 Drying and post-processing:

[0141] The wet film was transferred to a circulating air oven and dried in an oven at 60°C for 6 hours until the moisture content was ≤5%. The peeled film was pressed by a double-roll pleating machine with a pleat density of 3 lines / cm. It was then irradiated with an ultraviolet lamp for 10 minutes to increase the tensile strength of the film to 12.5MPa.

[0142] S6.4. Functional modification:

[0143] The pleated composite membrane was immersed in a 1% chitosan solution for 10 seconds, taken out and dried at 50° C. to form a protective layer with a thickness of 5 μm.

[0144] The preparation method of tea polyphenol-cellulose nanofibers comprises the following steps:

[0145] S7.1. Slurry mixing

[0146] The cellulose nanofibers, tea polyphenols and sodium chloride particles are mixed in a mass ratio of 3.5:1:15-18, and 0.15% sodium dodecyl sulfate is added to form a slurry with a solid content of 10%;

[0147] S7.2, Pressing and Forming

[0148] The slurry was injected into a mold and pressed at a pressure of 7 MPa for 3 minutes, and then cured at room temperature for 24 hours and vacuum dried at 55°C for 6 hours to obtain a molded body;

[0149] S7.3, Dissolution and desalination

[0150] The formed body was immersed in deionized water for 3 hours to dissolve the sodium chloride particles and form a porous structure with a porosity of 80%;

[0151] S7.4. Functionalization

[0152] The film was sprayed with 1.2% sodium alginate solution, immersed in 18% CaCl2 solution for cross-linking for 9 to 11 minutes, and then sprayed with 2.5% ethyl cellulose ethanol solution, and dried at 55°C to form a 2 μm anti-oxidation layer.

[0153] Embodiment 2

[0154] The method for preparing the aluminum-based organic metal framework comprises the following steps:

[0155] S5.1, raw material pretreatment stage: select activated MIL-101AL powder, mix it with polydimethylsiloxane and silica sol in a mass ratio of 9:1:1 at 32°C with mechanical stirring to form a uniform slurry with a solid content of 47%;

[0156] S5.2, molding: using a twin-screw extruder at a pressure of 0.75 MPa, a mold temperature of 90°C, and an extrusion rate of 25 cm / min to prepare a honeycomb structure with a pore diameter of 0.75 mm and a wall thickness of 0.15 mm, and a porosity of 80% to obtain a molded body;

[0157] S5.3, post-treatment process: the molded body is kept in a heat treatment furnace at 175°C for 1.5 hours, and then a fluorinated silane hydrophobic layer is formed on the surface by vapor deposition, with a coating thickness of 75 μm.

[0158] S5.4. Functional modification: amino functional groups were grafted onto the MOFs surface by atomic layer deposition, with 65 cycles and a controlled deposition rate of Finally, a modified material with an amino group loading of 0.8 mmol / g was obtained.

[0159] In actual use, after being used for a period of time, the aluminum-based organic metal framework 61 can be soaked in anhydrous ethanol for about 5 hours, and then dried in an environment of 70° C. for 6 hours before being used again.

[0160] The preparation method of the zeolite-graphene oxide composite membrane comprises the following steps:

[0161] S6.1, Raw material pretreatment:

[0162] S6.1.1 Select Y-type zeolite and ball-mill it to D50=1-5μm to obtain zeolite powder.

[0163] S6.1.2 Add graphene oxide to deionized water at a ratio of 1:100 mL and disperse by ultrasonic for 3 hours to obtain a uniform dispersion with a concentration of 3 mg / mL;

[0164] S6.1.3 Mix the zeolite and the dispersion liquid in a mass ratio of 1:2, add 0.1% sodium dodecyl sulfate as a dispersant, stir magnetically for 30 minutes, add 1% sodium carboxymethyl cellulose as a binder, and continue stirring for 1 hour to form a stable slurry;

[0165] S6.2, Film forming process:

[0166] The slurry was poured onto a PTFE substrate and coated with a doctor blade at a doctor blade pressure of 65 N / cm to form a wet film with a thickness of 350 μm. After the film was formed, it was allowed to stand for 18 hours for preliminary curing.

[0167] S6.3 Drying and post-processing:

[0168] The wet film was transferred to a circulating air oven and dried in an oven at 60°C for 7 hours until the moisture content was ≤5%. The peeled film was pressed by a double-roll pleating machine with a pleat density of 3 lines / cm. It was then irradiated with an ultraviolet lamp for 20 minutes to increase the tensile strength of the film to 12.5MPa.

[0169] S6.4. Functional modification:

[0170] The pleated composite membrane was immersed in a 1% chitosan solution for 10 seconds, taken out and dried at 50° C. to form a protective layer with a thickness of 7 μm.

[0171] The preparation method of tea polyphenol-cellulose nanofibers comprises the following steps:

[0172] S7.1. Slurry mixing

[0173] The cellulose nanofibers, tea polyphenols and sodium chloride particles are mixed in a mass ratio of 4:1:15-18, and 0.2% sodium dodecyl sulfate is added to form a slurry with a solid content of 13%;

[0174] S7.2, Pressing and Forming

[0175] The slurry was injected into a mold and pressed at a pressure of 8 MPa for 4 minutes, and then cured at room temperature for 24 hours and vacuum dried at 55°C for 7 hours to obtain a molded body;

[0176] S7.3, Dissolution and desalination

[0177] The formed body was immersed in deionized water for 3 hours to dissolve the sodium chloride particles and form a porous structure with a porosity of 83%;

[0178] S7.4. Functionalization

[0179] Spray 1.5% sodium alginate solution, immerse in 2.0% CaCl2 solution for cross-linking for 10 minutes, then spray 3% ethyl cellulose ethanol solution, and dry at 60°C to form a 3μm anti-oxidation layer.

[0180] Embodiment 3

[0181] The method for preparing the aluminum-based organic metal framework comprises the following steps:

[0182] S5.1, raw material pretreatment stage: select activated MIL-101AL powder, mix it with polydimethylsiloxane and silica sol at a mass ratio of 10:1:1 at 40°C with mechanical stirring to form a uniform slurry with a solid content of 50%;

[0183] S5.2, molding: using a twin-screw extruder at a pressure of 1.0 MPa, a mold temperature of 80-100° C., and an extrusion rate of 30 cm / min to prepare a honeycomb structure with a pore diameter of 1.0 mm and a wall thickness of 0.2 mm, and the porosity is controlled at 85% to obtain a molded body;

[0184] S5.3, post-treatment process: keep the molded body in a heat treatment furnace at 200° C. for 1.5 hours, and then form a fluorinated silane hydrophobic layer on the surface by vapor deposition, with a coating thickness of 100 μm.

[0185] S5.4, Functional modification: amino functional groups were grafted onto the MOFs surface by atomic layer deposition, with 80 cycles and a controlled deposition rate of Finally, a modified material with an amino group loading of 0.8 mmol / g was obtained.

[0186] In actual use, after being used for a period of time, the aluminum-based organic metal framework 61 can be immersed in anhydrous ethanol for about 5 hours, and then dried in an environment of 80° C. for 6 hours before being used again.

[0187] The preparation method of the zeolite-graphene oxide composite membrane comprises the following steps:

[0188] S6.1, Raw material pretreatment:

[0189] S6.1.1 Select Y-type zeolite and ball-mill it to D50=1-5μm to obtain zeolite powder.

[0190] S6.1.2 Add graphene oxide to deionized water at a ratio of 1:100 mL and disperse by ultrasonic for 3 hours to obtain a uniform dispersion with a concentration of 5 mg / mL;

[0191] S6.1.3 Mix zeolite and dispersion liquid in a mass ratio of 1:3, add 0.1% sodium dodecyl sulfate as a dispersant, stir magnetically for 30 minutes, add 1% sodium carboxymethyl cellulose as a binder, and continue stirring for 1 hour to form a stable slurry;

[0192] S6.2, Film forming process:

[0193] The slurry was poured onto a PTFE substrate and coated with a doctor blade at a doctor blade pressure of 80 N / cm to form a wet film with a thickness of 500 μm. After the film was formed, it was allowed to stand for 18 hours for preliminary curing.

[0194] S6.3 Drying and post-processing:

[0195] The wet film was transferred to a circulating air oven and dried in an oven at 60°C for 8 hours until the moisture content was ≤5%. The peeled film was pressed by a double-roll pleating machine with a pleat density of 3 lines / cm. It was then irradiated with an ultraviolet lamp for 30 minutes to increase the tensile strength of the film to 12.5MPa.

[0196] S6.4. Functional modification:

[0197] The pleated composite membrane was immersed in a 1% chitosan solution for 10 seconds, taken out and dried at 50° C. to form a protective layer with a thickness of 10 μm.

[0198] The preparation method of tea polyphenol-cellulose nanofibers comprises the following steps:

[0199] S7.1. Slurry mixing

[0200] The cellulose nanofibers, tea polyphenols and sodium chloride particles are mixed in a mass ratio of 4.5:1:15-18, and 0.25% sodium dodecyl sulfate is added to form a slurry with a solid content of 15%;

[0201] S7.2, Pressing and Forming

[0202] The slurry was injected into a mold and pressed at a pressure of 9 MPa for 5 minutes, and then cured at room temperature for 24 hours and vacuum dried at 55°C for 8 hours to obtain a molded body;

[0203] S7.3, Dissolution and desalination

[0204] The formed body was immersed in deionized water for 3 hours to dissolve the sodium chloride particles and form a porous structure with a porosity of 85%;

[0205] S7.4. Functionalization

[0206] Spray 1.2-1.8% sodium alginate solution, immerse in 2.2% CaCl2 solution for cross-linking for 11 minutes, then spray 3.5% ethyl cellulose ethanol solution, and dry at 65°C to form a 5μm anti-oxidation layer.

[0207] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A multiple cigarette purification device, characterized in that: include: An outer shell (1), wherein a filter chamber (2) is provided in the outer shell (1), and the outer shell (1) comprises an upper shell (11) and a lower shell (12) which are detachably connected; A mouthpiece (3), wherein the mouthpiece (3) is detachably connected to one end of the upper shell (11); A connecting piece (5), the connecting piece (5) being connected to one end of the lower shell (12) and being used for accommodating cigarettes; A filter component (6), the filter component (6) being arranged in the filter cavity (2), the filter component (6) comprising an aluminum-based organic metal framework (61), a zeolite-graphene oxide composite membrane (62) and tea polyphenol-cellulose nanofibers (63).

2. A multiple cigarette purification device according to claim 1, characterized in that: It also comprises an activated carbon fiber felt (7), wherein the activated carbon fiber felt (7) is arranged in the mouthpiece (3) and one end of the activated carbon fiber felt (7) is in contact with the tea polyphenol-cellulose nanofiber (63).

3. A multiple cigarette purification device according to claim 1, characterized in that: The tea polyphenol-cellulose nanofibers (63), the zeolite-graphene oxide composite membrane (62), and the aluminum-based organic metal framework (61) are arranged in sequence from the filter cavity (2) close to the mouthpiece (3) to the other end.

4. A multiple cigarette purification device according to claim 3, characterized in that: The tea polyphenol-cellulose nanofiber (63) is a porous honeycomb structure, the zeolite-graphene oxide composite membrane (62) is in a pleated form and is radially arranged along the filter cavity (2), and the aluminum-based organic metal framework (61) is in a honeycomb structure filled along the axial direction of the filter cavity (2).

5. A multiple cigarette purification device according to claim 1, characterized in that: The method for preparing the aluminum-based organic metal framework comprises the following steps: S5.1, raw material pretreatment stage: select activated MIL-101 (AL) powder, mix it with polydimethylsiloxane and silica sol at a mass ratio of (8-10): 1: 1 at 25-40°C with mechanical stirring to form a uniform slurry with a solid content of 45-50%; S5.2, molding: using a twin-screw extruder at a pressure of 0.5-1.0 MPa, a mold temperature of 80-100° C., and an extrusion rate of 20-30 cm / min to prepare a honeycomb structure with a pore size of 0.5-1.0 mm and a wall thickness of 0.1-0.2 mm, and a porosity of 75-85% to obtain a molded body; S5.3, post-treatment process: keep the molded body in a heat treatment furnace at 150-200°C for 1.5 hours, and then form a fluorinated silane hydrophobic layer on the surface by vapor deposition, with a coating thickness of 50-100 μm. S5.4, Functional modification: amino functional groups were grafted onto the MOFs surface by atomic layer deposition, with the number of cycles ranging from 50 to 80 and the deposition rate controlled at Finally, a modified material with an amino group loading of 0.8 mmol / g was obtained.

6. A multiple cigarette purification device according to claim 1, characterized in that: The preparation method of the zeolite-graphene oxide composite membrane comprises the following steps: S6.1, Raw material pretreatment: S6.1.1 Select Y-type zeolite and ball-mill it to D50=1-5μm to obtain zeolite powder. S6.1.2 Add graphene oxide to deionized water at a ratio of 1:100 mL and disperse by ultrasonic for 3 hours to obtain a uniform dispersion with a concentration of 2 to 5 mg / mL; S6.1.3 Mix the zeolite and the dispersion liquid in a mass ratio of 1:1 to 3, add 0.1% sodium dodecyl sulfate as a dispersant, stir magnetically for 30 minutes, add 1% sodium carboxymethyl cellulose as a binder, and continue stirring for 1 hour to form a stable slurry; S6.2, Film forming process: Pour the slurry onto the PTFE substrate and apply it with a scraper at a pressure of 50-80 N / cm to form a wet film with a thickness of 200-500 μm. After the film is formed, let it stand for 18 hours for preliminary curing. S6.3, Drying and post-processing: The wet film was transferred to a circulating air oven and dried in a 60°C oven for 6 to 8 hours until the moisture content was ≤5%. The peeled film was pressed by a double-roll pleating machine with a pleat density of 3 lines / cm. It was then irradiated with an ultraviolet lamp for 10 to 30 minutes to increase the tensile strength of the film to 12.5MPa. S6.

4. Functional modification: The pleated composite membrane was immersed in a 1% chitosan solution for 10 seconds, taken out and dried at 50° C. to form a protective layer with a thickness of 5 to 10 μm.

7. A multiple cigarette purification device according to claim 1, characterized in that: The preparation method of tea polyphenol-cellulose nanofibers comprises the following steps: S7.

1. Slurry mixing The cellulose nanofibers, tea polyphenols and sodium chloride particles are mixed in a mass ratio of (3.5-4.5):1:(15-18), and 0.15-0.25% sodium dodecyl sulfate is added to form a slurry with a solid content of 10-15%; S7.2, Pressing and Forming The slurry is injected into a mold and pressed at a pressure of 7 to 9 MPa for 3 to 5 minutes, and then cured at room temperature for 24 hours and vacuum dried at 55°C for 6 to 8 hours to obtain a molded body; S7.3, Dissolution and desalination The formed body is immersed in deionized water for 3 hours to dissolve the sodium chloride particles and form a porous structure with a porosity of 80 to 85%; S7.

4. Functionalization The method comprises spraying 1.2-1.8% sodium alginate solution, immersing in 18-2.2% CaCl2 solution for cross-linking for 9-11 minutes, and then spraying 2.5-3.5% ethyl cellulose ethanol solution, and drying at 55-65° C. to form a 2-5 μm anti-oxidation layer.

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