Tobacco filter tip containing distillers' grains and preparation method of tobacco filter tip

Abstract

The invention relates to the technical field of tobacco auxiliary material processing, in particular to a vinasse-containing tobacco filter tip and a preparation method thereof, and a main body of the vinasse-containing tobacco filter tip is composed of an upper filter tip body, a vinasse filter tip body and a lower filter tip body in sequence. The vinasse filter tip rod is prepared from 50 parts of modified vinasse, 4-6 parts of a humectant and 10-15 parts of cellulose acetate fibers. The modified vinasse is obtained by performing low-temperature vacuum drying, inert gas protection and molecular distillation dealcoholization on the modified vinasse to retain natural bouquet components, embedding the modified vinasse with a porous carrier, performing cross-linking modification on the modified vinasse and natural plant tannic acid, and performing spray granulation. The structure enables the vinasse functional layer to be located in the middle of the smoke channel, high-temperature damage is avoided, and slow release of fragrance and gradient adsorption of noxious substances are achieved. Tannic acid can selectively intercept harmful substances such as nicotine and nitrosamine, and the porous carrier and the fiber network cooperate to enhance physical adsorption of tar and carbon monoxide. According to the invention, high-value utilization of wine-making wastes is realized, the natural aroma enhancement and harm reduction functions are realized, the process compatibility is strong, the sensory harmony is good, and the environmental protection and industrialization values are remarkable.

Description

Technical Field

[0001] This application relates to the field of tobacco auxiliary material processing technology, and more specifically, to a tobacco filter rod containing distillers' grains and its preparation method. Background Technology

[0002] Distillers' grains are rich in crude protein, cellulose, organic acids, and various natural volatile flavor compounds, such as ethyl acetate, ethyl hexanoate, and ethyl lactate, possessing a rich and unique aroma characteristic of alcoholic beverages. However, the current resource utilization methods for distillers' grains are still relatively extensive, mainly used as low-value-added animal feed or agricultural organic fertilizer. Due to its trace amounts of residual alcohol, high moisture content, and susceptibility to spoilage, coupled with a lack of efficient separation and functional utilization technologies, the natural aroma components contained in distillers' grains have not been effectively extracted and utilized at a high value, resulting not only in resource waste but also in environmental pressure.

[0003] In the tobacco industry, the functional design of filter materials has garnered significant attention to improve the cigarette smoking experience and reduce health risks. Current technologies typically involve adding activated carbon to the filter rod to adsorb harmful components such as tar and carbon monoxide, or embedding flavoring capsules, such as fruit, mint, or liquor flavors, to impart specific aromas to the smoke. However, most flavorings used on the market are synthetic compounds, resulting in limited and unnatural aromas, and some consumers have concerns about the safety of chemical additives. Although some brands have attempted to incorporate the flavor of baijiu (Chinese liquor) into cigarettes, this still relies on externally blended flavorings and does not truly utilize natural liquor components, leading to poor aroma coordination, short-lasting fragrance, and limited sensory experience. More importantly, existing liquor-flavored filters generally lack the ability to selectively regulate nicotine and other alkaloids, failing to effectively filter harmful components while releasing natural liquor aromas, thus making it difficult to achieve the dual goals of "natural aroma enhancement" and "harm reduction and health benefits."

[0004] Therefore, how to utilize the lees produced during the brewing process of baijiu in a high-value and functional way, extract or retain its natural aroma components in situ, and integrate them into cigarette filter rod materials to develop a new type of functional filter that can both naturally release the aroma of baijiu and have good adsorption properties for harmful substances has become an important technical direction connecting the resource utilization of brewing waste with the upgrading of tobacco products. Summary of the Invention

[0005] In order to solve the problem of balancing "natural aroma enhancement" and "harm reduction and health" in cigarettes, this application provides a tobacco filter rod containing distillers' grains and its preparation method.

[0006] In the first aspect, this application provides a tobacco filter containing distillers' grains, employing the following technical solution: A tobacco filter rod containing distillers' grains includes a tobacco filter rod body, which comprises, from top to bottom, an upper filter rod, a distillers' grains filter rod, and a lower filter rod. The distillers' grains filter rod is prepared from the following raw materials in parts by weight: 50 parts modified distiller's grains 4-6 parts moisturizer 10-15 parts of cellulose acetate filament; The modified distiller's grains are prepared by the following method: 1) Fresh distiller's grains are pressed and dehydrated to a moisture content of 50-60%, and then vacuum dried at 40-60℃ to a moisture content of 10-15%. During the drying process, an inert gas is introduced for protection, and residual ethanol is initially removed by vacuum distillation or molecular distillation. 2) Mix the dried distiller's grains powder with a food-grade porous carrier at a mass ratio of (5-10):1, and embed them at 40-50℃ for 2-4 hours; 3) Disperse the encapsulated lees powder in an ethanol-water mixed solvent, add natural plant tannins, stir and react at 30-40℃ for 1-2 hours, filter, and obtain filter residue; The amount of natural plant tannins added is 0.5-2.0% of the mass of the distiller's grains powder; The filter residue is spray-granulated to obtain modified distiller's grains; The acetate fiber monofilament has a fineness of 1.5-5.0 dtex, a total fineness of 20,000-50,000 dtex, and a length of 3-6 mm.

[0007] By adopting the above technical solution, the filter rod adopts a three-section structure of upper filter rod - lees filter rod - lower filter rod, so that the lees functional layer is located in the middle of the mainstream flue gas channel. This avoids the direct pyrolysis of the high-temperature combustion zone that destroys the aroma components, and ensures that the flue gas fully contacts the modified lees layer, so as to achieve effective release of aroma and gradient filtration of harmful substances, while taking into account both smoothness of inhalation and functional synergy.

[0008] This application uses distiller's grains as raw material and employs processes such as low-temperature drying, inert atmosphere protection, and molecular distillation to preserve its natural volatile flavor compounds to the maximum extent, avoiding aroma loss caused by high temperatures or strong oxidation conditions. Simultaneously, by combining porous carrier encapsulation and tannic acid cross-linking modification, not only are the aroma components stabilized, but the physicochemical stability of the material is also improved, transforming the originally low-value, perishable distiller's grains into a filter component with functional value. The natural plant tannins introduced during the modification process are rich in polyphenolic hydroxyl groups, which can undergo hydrogen bonding or weak complexation with alkaloids and free radicals such as nicotine and nitrosamines in cigarette smoke, achieving selective retention of some harmful components. Simultaneously, the three-dimensional network structure constructed by the porous carrier and cellulose acetate filaments enhances the filter's physical adsorption capacity for harmful substances such as tar and carbon monoxide. Therefore, while releasing the natural aroma of alcohol, the filter's harm-reduction function is not sacrificed and may even be enhanced.

[0009] Preferably, before pressing and dehydration, fresh lees are mixed with a complex of cellulase and protease at 0.3%-0.8% of the dry weight of the lees, and enzymatically hydrolyzed at 35-40℃ for 2-4 hours to obtain pretreated lees.

[0010] Preferably, the cellulase has an enzyme activity of 10,000 to 15,000 U / g.

[0011] Preferably, the protease complex enzyme is a mixed enzyme preparation composed of neutral protease and flavor protease in a mass ratio of (1-3):1, wherein the enzyme activity of the neutral protease is 15,000-20,000 U / g and the enzyme activity of the flavor protease is 500-1000 U / g.

[0012] All enzyme preparations used were purchased from Jinan BestGene Biotechnology Co., Ltd.

[0013] By employing the aforementioned technical solution, a combination of cellulase and protease is introduced into the fresh distiller's grains before pressing and dehydration for gentle enzymatic pretreatment. This effectively degrades the complex cell wall structure and large molecular proteins in the distiller's grains, improving subsequent pressing and dehydration efficiency and reducing energy consumption. Furthermore, it promotes the full release and exposure of naturally volatile flavor compounds encapsulated in the cell matrix, laying the foundation for the retention and stabilization of aroma components during subsequent drying and encapsulation processes. Simultaneously, the small molecule peptides and reducing sugars produced by enzymatic hydrolysis can synergistically interact with the original flavor compounds in the distiller's grains, enhancing the overall roundness and complexity of the aroma, further improving the natural aroma expression of the final filter product.

[0014] Preferably, the modified distiller's grains obtained by spray granulation have a particle size range of 80-200 μm and a bulk density of 0.3-0.6 g / cm³. 3 .

[0015] By adopting the above technical solution, the dispersion, air permeability and aroma retention performance of the filter rod can be effectively balanced: the particle size range avoids the problems of increased draw resistance and dust dispersion caused by excessively fine particles, and also prevents the particles from being too large, which would reduce the specific surface area and affect the aroma release efficiency; the appropriate bulk density ensures that the particles are uniformly embedded in the cellulose acetate filament network to form a stable porous structure, which is conducive to the uniform passage of smoke and full contact with active ingredients, thereby achieving stable and slow release of natural wine aroma and effective retention of harmful substances, while ensuring the smoothness of cigarette smoking and sensory consistency.

[0016] Preferably, the food-grade porous carrier has a specific surface area of ​​200-800 m² / g and a pore size distribution of 200-500 nm.

[0017] By adopting the above technical solution, volatile natural esters and other flavor substances in the distillery lees can be efficiently adsorbed and stably encapsulated, preventing their loss during drying, storage, or cigarette processing. This ensures both effective loading and sustained release of aroma components while avoiding clumping or mold growth caused by excessive retention of small molecule solvents or moisture. Furthermore, the high specific surface area further enhances the carrier's physical adsorption capacity for harmful components in the smoke, such as nicotine and nitrosamines, and, in conjunction with the chemical action of tannins, improves the overall performance of the filter in "enhancing aroma and reducing harm."

[0018] Preferably, the food-grade porous carrier is one of β-cyclodextrin, mesoporous silica, activated carbon, diatomaceous earth, chitosan microspheres, or maltodextrin.

[0019] By employing the aforementioned food-grade porous carriers, not only is the safety and regulatory compliance of the materials ensured in tobacco applications, but the structural and functional characteristics of different carriers also enable efficient loading, stable encapsulation, and controlled release of natural volatile flavor compounds from distillers' grains. β-Cyclodextrin can specifically fix small-molecule ester aromas through cavity encapsulation, enhancing aroma longevity; mesoporous silica and activated carbon, with their high specific surface area and suitable pore size, enhance the physical adsorption of aroma molecules and the retention of harmful components in smoke; diatomaceous earth and maltodextrin provide good dispersibility and formability, facilitating the uniform distribution of modified distillers' grain particles in the filter substrate; chitosan microspheres possess biodegradability, weak alkalinity, and film-forming ability, and can synergistically enhance the adsorption of acidic harmful substances such as nicotine with tannins. The variety of optional carriers gives this solution the ability to flexibly adapt to different aroma types of distillers' grains and product positioning, significantly improving the harm reduction performance and processing practicality of the filter while ensuring the natural aroma enhancement effect.

[0020] Preferably, in step 4), the inlet air temperature of the spray granulation is 120-160℃, the outlet air temperature is 60-80℃, and the atomization pressure is 0.15-0.30 MPa.

[0021] By adopting the above technical solution, heat-sensitive natural aroma components in the lees, such as ethyl acetate and ethyl hexanoate, can be effectively protected from high temperature damage while rapidly drying and molding. The appropriate inlet air temperature ensures that the droplets are quickly dehydrated to form stable particles, while the lower outlet air temperature avoids excessive internal temperature of the particles, which could lead to the volatilization or degradation of flavor substances. The optimized atomization pressure ensures uniform atomization of the liquid, forming microspheres with uniform particle size, dense structure, and smooth surface. This is beneficial for improving the bulk density stability and flowability of the modified lees particles, facilitating uniform mixing in the filter rod, and providing an ideal physical structure basis for aroma slow release and harmful substance adsorption.

[0022] Preferably, the moisturizer is one or more of glycerin, propylene glycol, sorbitol, or trehalose.

[0023] By employing the aforementioned humectants, not only are food-grade safety standards met, but the filter tip also effectively maintains the microenvironmental humidity of the modified distillers' grains during use, preventing them from cracking due to dryness and embrittlement, which could lead to a sudden release of aroma or dust dispersion. Simultaneously, these polyol or sugar humectants possess excellent water solubility and moisture-absorbing and retaining capabilities, allowing them to synergistically regulate the release rate of aroma components according to changes in smoke temperature and humidity during cigarette smoking, resulting in a smoother, longer-lasting aroma release that blends naturally with the smoke. Furthermore, trehalose and other substances possess certain antioxidant and bioactive molecule-stabilizing properties, further protecting the integrity of natural flavor substances in the distillers' grains, thereby enhancing the overall sensory quality and functional stability of the filter tip.

[0024] Preferably, the inert gas is nitrogen or argon, and the flow rate is controlled at 0.5-2 L / min.

[0025] By employing the above technical solution, oxygen within the drying chamber can be effectively replaced, inhibiting the oxidative degradation and rancidity of flavor-active components such as unsaturated fatty acids, natural esters, and alcohols in the lees. This flow rate range maintains a stable inert atmosphere, preventing the formation of localized oxidation hotspots, while also preventing excessive loss of volatile aroma compounds due to excessive airflow. Thus, while efficiently dehydrating, the original natural aroma characteristics of the lees are preserved to the maximum extent, providing a crucial guarantee for the subsequent preparation of functional filter materials with high aroma fidelity.

[0026] Preferably, the fresh lees are derived from the distilled lees produced during the brewing process of soy sauce aroma, strong aroma, or light aroma baijiu.

[0027] By adopting the above technical solution, the unique natural flavor compounds in different types of brewing lees can be fully utilized. At the same time, by selectively using different types of brewing lees as raw materials, the style positioning of the target cigarette product can be accurately matched without adding exogenous flavorings, achieving a differentiated aroma enhancement effect of "one brew, one aroma, natural harmony". In addition, this limitation clarifies the industrial feasibility and large-scale supply basis of raw material sources, ensuring that the technical solution has good resource integration capabilities and industrialization value in the main brewing production areas.

[0028] Secondly, this application provides a method for preparing a tobacco filter rod containing distillers' grains, using the following technical solution: A method for preparing a tobacco filter containing distillers' grains includes the following preparation steps: S1. Mix modified distillers' grains, humectant and cellulose acetate filaments, and then prepare them into rods to obtain distillers' grains filter rods; S2. Then assemble the upper filter rod, the lees filter rod, and the lower filter rod, and wrap them with paper to obtain a tobacco filter rod containing lees.

[0029] By adopting the above technical solution, modified distillers' grains, humectants, and cellulose acetate filaments are uniformly mixed and directly molded into distillers' grain filter rods. These rods are then modularly assembled with upper and lower filter rods and paper-wrapped for shaping. The process is simple, efficient, and easily compatible with existing cigarette filter rod production lines. This not only ensures the stable distribution and structural integrity of the modified distillers' grains in the filter, preventing the loss of aroma components during processing, but also optimizes the smoke flow path through a three-section structural design. This allows the natural aroma of the distillers' grains to be slowly released and enhanced in the middle section, while the upper and lower filter sections work together to complete preliminary filtration and deep adsorption. This effectively balances the smoothness of inhalation, sensory harmony, and the retention of harmful components, thereby achieving the dual technical goals of "natural aroma enhancement" and "harm reduction and health" in a low-cost and scalable manner.

[0030] In summary, this application has the following beneficial effects: This invention successfully prepared functional modified distillers' grains with both high aroma retention and structural stability by subjecting them to low-temperature drying, inert protection, and de-alcoholization treatment, combined with porous carrier encapsulation and cross-linking modification with natural plant tannins. This modified grain is integrated into the middle functional layer of a three-section filter structure (top-middle-bottom), achieving both slow-release enhancement of natural wine aroma and gradient synergistic filtration of harmful components in cigarette smoke while avoiding high-temperature pyrolysis. The introduced tannins selectively adsorb alkaloids such as nicotine and nitrosamines, and the three-dimensional network constructed by the porous carrier and cellulose acetate filaments significantly enhances the physical retention capacity for tar and carbon monoxide. This solution not only achieves high-value and green utilization of brewing waste but also simultaneously achieves the dual technical effects of "natural aroma enhancement" and "harm reduction" without relying on artificial flavorings, improving the sensory quality and health friendliness of cigarettes, demonstrating outstanding practicality and industrialization prospects. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the tobacco filter rod containing lees in Example 1.

[0032] Attached reference numerals: 1. Upper filter rod; 2. Distillers' grains filter rod; 3. Lower filter rod. Detailed Implementation Example Example

[0033] A tobacco filter containing distillers' grains, comprising a tobacco filter body, such as... Figure 1 As shown, the tobacco filter rod body includes, from top to bottom, an upper filter rod 1, a lees filter rod 2, and a lower filter rod 3.

[0034] The tobacco filter containing distillers' grains is prepared by the following method: S1. Mix 50g of modified distiller's grains, 4g of humectant (glycerin) and 10g of cellulose acetate filaments, and then prepare them into rods to obtain distiller's grains filter rods. S2. Then assemble the upper filter rod, the lees filter rod, and the lower filter rod, and wrap them with paper to obtain a tobacco filter rod containing lees.

[0035] Modified distiller's grains are prepared by the following method: 1) Press 500g of fresh distiller's grains to dehydrate to a moisture content of 50%, then vacuum dry at 40℃ to a moisture content of 10%, and introduce inert gas for protection during the drying process, while removing residual ethanol through vacuum distillation or molecular distillation. 2) Mix 100g of dried distiller's grains powder with 20g of food-grade porous carrier at a mass ratio of 5:1, and embed at 40℃ for 2 hours; 3) Disperse the encapsulated lees powder in an ethanol-water mixed solvent (70% water and 30% ethanol by volume), add 0.5g of natural plant tannins (tannins), stir and react at 30°C for 1 hour, filter, and obtain filter residue; The amount of natural plant tannins added is 0.5% of the mass of the distiller's grains powder; The filter residue is spray-granulated to obtain modified distiller's grains; The acetate fiber monofilament has a fineness of 1.5 dtex, a total fineness of 50,000 dtex, and a length of 3 mm.

[0036] The modified distiller's grains obtained by spray granulation have a particle size range of 80 μm and a bulk density of 0.3 g / cm³. 3 .

[0037] The specific surface area of ​​the food-grade porous carrier is 200 m². 2 / g, with a pore size distribution of 200nm.

[0038] The food-grade porous carrier is β-cyclodextrin.

[0039] Step 4) The inlet air temperature of the spray granulation is 120℃, the outlet air temperature is 60℃, and the atomization pressure is 0.15MPa.

[0040] The inert gas is nitrogen, and the flow rate is controlled at 0.5 L / min.

[0041] Fresh lees come from the lees produced during the brewing of soy sauce-flavored baijiu after distillation.

[0042] Example 2 A tobacco filter containing distillers' grains, comprising a tobacco filter body, such as... Figure 1 As shown, the tobacco filter rod body includes, from top to bottom, an upper filter rod 1, a lees filter rod 2, and a lower filter rod 3.

[0043] The tobacco filter containing distillers' grains is prepared by the following method: S1. Mix 50g of modified distiller's grains, 5g of humectant (sorbitol) and 13g of cellulose acetate filaments, and then prepare them into rods to obtain distiller's grains filter rods. S2. Then assemble the upper filter rod, the lees filter rod, and the lower filter rod, and wrap them with paper to obtain a tobacco filter rod containing lees.

[0044] Modified distiller's grains are prepared by the following method: 1) 500g of fresh distiller's grains were pressed and dehydrated to a moisture content of 55%, and then vacuum dried at 50℃ to a moisture content of 13%. During the drying process, an inert gas was introduced for protection, and residual ethanol was initially removed by vacuum distillation. 2) Mix 100g of dried distiller's grains powder with a food-grade porous carrier at a mass ratio of 8:1, and embed at 45°C for 3 hours. 3) Disperse the encapsulated lees powder in an ethanol-water mixed solvent (75% water and 25% ethanol by volume), add 1.5g of natural plant tannins (tea polyphenols), stir and react at 35℃ for 1.5 hours, filter, and obtain filter residue; The amount of natural plant tannins added is 1.5% of the mass of the distiller's grains powder; The filter residue is spray-granulated to obtain modified distiller's grains; The cellulose acetate filament has a fineness of 3.5 dtex, a total fineness of 40,000 dtex, and a length of 5 mm.

[0045] The modified distiller's grains obtained by spray granulation have a particle size range of 150 μm and a bulk density of 0.4 g / cm³. 3 .

[0046] The specific surface area of ​​the food-grade porous carrier is 500 m². 2 / g, with a pore size distribution of 300nm.

[0047] The food-grade porous carrier is mesoporous silica.

[0048] Step 4) The inlet air temperature of the spray granulation is 150℃, the outlet air temperature is 70℃, and the atomization pressure is 0.20MPa.

[0049] The inert gas is argon, and the flow rate is controlled at 1.5 L / min.

[0050] Fresh lees come from the lees produced during the distillation process of strong-aroma baijiu.

[0051] Example 3 A tobacco filter containing distillers' grains, comprising a tobacco filter body, such as... Figure 1 As shown, the tobacco filter rod body includes, from top to bottom, an upper filter rod 1, a lees filter rod 2, and a lower filter rod 3.

[0052] The tobacco filter containing distillers' grains is prepared by the following method: S1. Mix 50g of modified distiller's grains, 6g of humectant (propylene glycol) and 15g of cellulose acetate filaments, and then prepare them into rods to obtain distiller's grains filter rods. S2. Then assemble the upper filter rod, the lees filter rod, and the lower filter rod, and wrap them with paper to obtain a tobacco filter rod containing lees.

[0053] Modified distiller's grains are prepared by the following method: 1) 500g of fresh distiller's grains were pressed and dehydrated to a moisture content of 60%, and then vacuum dried at 60℃ to a moisture content of 15%. During the drying process, an inert gas was introduced for protection, and residual ethanol was initially removed by vacuum distillation. 2) Mix 100g of dried distiller's grains powder with 10g of food-grade porous carrier at a mass ratio of 10:1, and embed at 50℃ for 4 hours; 3) Disperse the encapsulated lees powder in an ethanol-water mixed solvent (80% water and 20% ethanol by volume), add 2g of natural plant tannins (tannins), and stir the mixture at 30-40℃ for 1-2 hours. Filter to obtain the filter residue. The amount of natural plant tannins added is 2.0% of the mass of the distiller's grains powder; 4) The filter residue is spray-granulated to obtain modified distiller's grains; The single filament of cellulose acetate has a fineness of 5.0 dtex, a total fineness of 20,000 dtex, and a length of 6 mm.

[0054] The modified distiller's grains obtained by spray granulation have a particle size range of 200 μm and a bulk density of 0.6 g / cm³. 3 .

[0055] The specific surface area of ​​the food-grade porous carrier is 800 m². 2 / g, with a pore size distribution of 500nm.

[0056] The food-grade porous carrier is activated carbon.

[0057] Step 4) The inlet air temperature of the spray granulation is 160℃, the outlet air temperature is 80℃, and the atomization pressure is 0.30MPa.

[0058] The inert gas is nitrogen, and the flow rate is controlled at 2 L / min.

[0059] Fresh lees come from the lees produced during the brewing of light-aroma baijiu (Chinese liquor).

[0060] Example 4 A tobacco filter containing distillers' grains. The difference between this embodiment and Embodiment 1 is that, before pressing and dehydration, 500g of fresh distillers' grains are mixed with a complex of cellulase and protease at 0.3% of the dry weight of the distillers' grains, with a weight ratio of cellulase to protease of 1:1, and enzymatically hydrolyzed at 35°C for 2 hours to obtain pretreated distillers' grains.

[0061] The cellulase activity is 10,000 U / g.

[0062] The protease complex enzyme is a mixed enzyme preparation composed of neutral protease and flavor protease in a mass ratio of 1:1. The enzyme activity of the neutral protease is 15,000 U / g, and the enzyme activity of the flavor protease is 500 U / g.

[0063] All enzyme preparations used were purchased from Jinan BestGene Biotechnology Co., Ltd.

[0064] Example 5 A tobacco filter containing distillers' grains. The difference between this embodiment and Embodiment 1 is that, before pressing and dehydration, 500g of fresh distillers' grains are mixed with a complex of cellulase and protease at 0.8% of the dry weight of the distillers' grains, with a weight ratio of cellulase to protease of 2:1. The mixture is then enzymatically hydrolyzed at 40°C for 4 hours to obtain pretreated distillers' grains.

[0065] The cellulase activity is 15,000 U / g.

[0066] The protease complex enzyme is a mixed enzyme preparation composed of neutral protease and flavor protease in a mass ratio of 3:1. The enzyme activity of the neutral protease is 20,000 U / g, and the enzyme activity of the flavor protease is 1,000 U / g.

[0067] All enzyme preparations used were purchased from Jinan BestGene Biotechnology Co., Ltd.

[0068] Example 6 A tobacco filter tip containing distillers' grains, the difference between this embodiment and Embodiment 1 is that the specific surface area of ​​the food-grade porous carrier is 100 m². 2 / g.

[0069] Comparative Example Comparative Example 1 A tobacco filter containing distillers' grains, the difference between this comparative example and Example 1 is that the modified distillers' grains are replaced with pressed and dried distillers' grains powder with a moisture content of 10%.

[0070] Comparative Example 2 A tobacco filter containing distillers' grains. The difference between this comparative example and Example 1 is that tannic acid is not added in step 3) of the preparation of the modified distillers' grains, while the rest of the process remains unchanged.

[0071] Comparative Example 3 A tobacco mouthpiece containing distillers' grains, the difference between this comparative example and Example 1 is that the food-grade porous carrier is omitted in step 2).

[0072] Comparative Example 4 A tobacco mouthpiece containing distillers' grains, which differs from Example 1 in that no humectant is added.

[0073] Comparative Example 5 A tobacco filter containing distillers' grains, the difference between this comparative example and Example 1 is that activated carbon fiber is used instead of cellulose acetate.

[0074] Detection methods / test methods Nicotine selective adsorption test: Collection method: After the smoke machine is used for aspiration, 20 mL of 0.01 M HCl is added to the filter rod of the distiller's grains and ultrasonically extracted for 30 min. After filtration, the mixture is put into the machine for testing. Chromatographic conditions: C18 column (250 mm × 4.6 mm, 5 μm), mobile phase acetonitrile-0.02 M phosphate buffer (pH 3.5, 20:80), detection wavelength 260 nm. Calculate nicotine filtration efficiency = (filter capture / total throughput) × 100%. Tar: Tar was collected using Cambridge filters in accordance with ISO 4387 standard, and the tar filtration efficiency was calculated by weighing method.

[0075] Carbon monoxide: The smoking machine is connected to a non-dispersive infrared analyzer (NDIR) to detect the CO concentration before and after the filter tip online.

[0076] Sensory evaluation verification: personnel selection criteria Qualification requirements: Hold a "Tobacco Sensory Inspector" certificate issued by the Tobacco Quality Supervision and Inspection Center. Experience requirements: ≥5 years of experience in cigarette sensory evaluation, with an average annual smoking volume of >500 cigarettes. Physiological requirements: Individuals without smoke-induced taste blindness or impaired sense of smell will be excluded; smoking, alcohol, and spicy or stimulating foods must be avoided for 24 hours prior to the assessment. Group size: 7 people per group Sample: Test cigarettes containing distillers' grains filters Temperature: (22±2)°C Humidity: (60±5)% RH Ventilation: Independent evaluation and absorption room with an air exchange rate of ≥10 times / hour, maintaining no background odor; Suction conditions Equipment: Manual suction follows ISO 3308 parameters. Aspiration volume: 35±0.5 mL Aspiration duration: 2 ± 0.1 s Aspiration interval: 60±0.5 s Number of puffs per cigarette: 8 puffs per cigarette (2 first puffs, 4 middle puffs, and 2 last puffs), recording the number of people who considered the aroma of alcohol in the smoke to be normal. Experimental data are shown in Table 1. Table 1. Experimental data of Examples 1-6 and Comparative Examples 1-5

[0077] The experimental data in the table show that the technical solution in this application produces a tobacco filter rod containing distillers' grains that has a good physical adsorption capacity for harmful substances such as tar, nicotine, and carbon monoxide. At the same time, it can effectively release the natural aroma of alcohol, achieving effective release of aroma and gradient filtration of harmful substances, while taking into account both smoothness of inhalation and functional synergy.

[0078] Comparing Example 1 with Comparative Examples 1-5, Comparative Example 1 uses unmodified distiller's grains, indicating that due to the lack of aroma stability and adsorption function, its various performance characteristics are low; Comparative Examples 2 and 3 lack chemical selective adsorption and physical slow-release capabilities, respectively, resulting in decreased nicotine / tar filtration efficiency and poor sensory evaluation; Comparative Example 4, although its harm reduction effect is close to that of Example 1, may affect long-term aroma stability; and Comparative Example 5, although improving filtration efficiency, seriously damages the smoke harmony and has extremely low sensory acceptance. This demonstrates that this application achieves the dual effects of "natural aroma enhancement" and "highly efficient harm reduction" through low-temperature inert drying, porous carrier embedding, tannic acid crosslinking, and humectant synergy.

[0079] A comparison of Examples 1 and 4-5 demonstrates that introducing a combined enzymatic hydrolysis process of cellulase and protease during the pretreatment stage of distiller's grains can further improve the harm reduction performance and sensory quality of the filter tip.

[0080] Comparing Examples 1 and 6, it is evident that only when the porous carrier has a sufficiently high specific surface area can it effectively load and stabilize volatile aroma substances in the distiller's grains, and work in conjunction with tannins and fiber structure to achieve efficient retention of harmful substances. If the specific surface area is insufficient, it is difficult to achieve both slow-release aroma enhancement and harm reduction functions, thereby weakening the overall performance of the product.

[0081] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A tobacco filter containing distillers' grains, characterized in that, The device includes a tobacco filter rod body, which comprises, from top to bottom, an upper filter rod (1), a distillers' grains filter rod (2), and a lower filter rod (3). The distillers' grains filter rod (2) is prepared from the following raw materials in parts by weight: 50 parts modified distiller's grains 4-6 parts moisturizer 10-15 parts of cellulose acetate filament; The modified distiller's grains are prepared by the following method: 1) Fresh distiller's grains are pressed and dehydrated to a moisture content of 50-60%, and then vacuum dried at 40-60℃ to a moisture content of 10-15%. During the drying process, an inert gas is introduced for protection, and residual ethanol is initially removed by vacuum distillation or molecular distillation. 2) Mix the dried distiller's grains powder with a food-grade porous carrier at a mass ratio of (5-10):1, and embed them at 40-50℃ for 2-4 hours; 3) Disperse the encapsulated lees powder in an ethanol-water mixed solvent, add natural plant tannins, stir and react at 30-40℃ for 1-2 hours, filter, and obtain filter residue; The amount of natural plant tannins added is 0.5-2.0% of the mass of the distiller's grains powder; The filter residue is spray-granulated to obtain modified distiller's grains; The acetate fiber monofilament has a fineness of 1.5-5.0 dtex, a total fineness of 20,000-50,000 dtex, and a length of 3-6 mm.

2. The tobacco filter rod containing distillers' grains according to claim 1, characterized in that: Before pressing and dehydration, fresh lees are mixed with a complex of cellulase and protease at 0.3%-0.8% of the dry weight of the lees and enzymatically hydrolyzed at 35-40℃ for 2-4 hours to obtain pretreated lees.

3. The tobacco filter rod containing distillers' grains according to claim 1, characterized in that: The modified distiller's grains obtained by spray granulation have a particle size range of 80-200 μm and a bulk density of 0.3-0.6 g / cm³. 3 .

4. The tobacco filter rod containing distillers' grains according to claim 1, characterized in that: The specific surface area of ​​the food-grade porous carrier is 200-800 m². 2 / g, with a pore size distribution of 200-500nm.

5. The tobacco filter rod containing distillers' grains according to claim 4, characterized in that: The food-grade porous carrier is one of β-cyclodextrin, mesoporous silica, activated carbon, diatomaceous earth, chitosan microspheres, or maltodextrin.

6. The tobacco filter rod containing distillers' grains according to claim 1, characterized in that: Step 4) The inlet air temperature of the spray granulation is 120-160℃, the outlet air temperature is 60-80℃, and the atomization pressure is 0.15-0.30 MPa.

7. The tobacco filter rod containing distillers' grains according to claim 1, characterized in that: The moisturizer is one or more of glycerin, propylene glycol, sorbitol, or trehalose.

8. The tobacco filter rod containing distillers' grains according to claim 1, characterized in that: The inert gas is nitrogen or argon, and the flow rate is controlled at 0.5-2 L / min.

9. The tobacco filter rod containing distillers' grains according to claim 1, characterized in that: The fresh lees are derived from the distilled lees produced during the brewing process of soy sauce aroma, strong aroma, or light aroma baijiu.

10. A method for preparing a tobacco filter containing distillers' grains as described in any one of claims 1-9, characterized in that, The preparation steps include the following: S1. Mix the modified distillers' grains, humectant and cellulose acetate filaments and then prepare them into rods to obtain distillers' grains filter rods (3). S2. Then assemble the upper filter rod (1), the lees filter rod (2) and the lower filter rod (3), and wrap them with paper to obtain a tobacco filter rod containing lees.

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