A device for collecting and detecting tar in tobacco.

Abstract

This utility model relates to a collection and detection device for tar in tobacco, specifically in the field of tobacco detection technology. The collection device includes a tobacco ignition device and a tar collection unit; the tar collection unit is connected to an air extraction device; the tar collection unit includes a collection chamber and an adsorption filter disposed within the collection chamber; the inner wall of the collection chamber is coated with a hydrophobic coating. The collection device provided by this utility model is a rapid tobacco tar detection device based on the principles of vacuum and solid-liquid separation. By simulating the combustion environment of a cigarette and quantifying the amount of tar released, it achieves rapid and low-cost detection of tar content in tobacco leaves, and the detection results are highly consistent with those obtained using traditional cigarette rolling methods.

Description

Technical Field

[0001] This utility model relates to the field of tobacco detection technology, specifically to a device for collecting and detecting tar in tobacco, and more particularly to a device for collecting and detecting tar in flue-cured tobacco leaves, which is suitable for convenient and high-precision detection of tar content in tobacco leaves during tobacco processing. Background Technology

[0002] Currently, tar detection mainly involves rolling cigarettes, using a cigarette-smoking machine to collect tar from the smoke, and then performing quantitative analysis. The detection method clearly specifies standards for cigarette-smoking machines, cigarette butt length, filter length, tipping paper length, smoking time, and smoking capacity, among other parameters.

[0003] For example, CN111220777A discloses a method for detecting the tar release of cigarettes. After balancing the cigarette to be tested, the circumference of the cigarette, the length of the cigarette, and the width of the shredded portion are measured. The results are then substituted into the following model: 1 / Sqrt(tar release) = 0.94996 - 0.050728 × A - 5.69994 × 10 -4 ×B+0.084943×C+2.98634×10 -5 ×A×B+6.36659×10 -4 ×A×C-4.87006×10 -4 ×B×C+8.78595×10 -4 ×A 2 -8.25814×10 -6 ×B 2 -0.026577×C 2 A represents the circumference of the cigarette, B represents the length of the cigarette, and C represents the width of the shredded cigarette. The model is solved to obtain the tar release of the cigarette to be tested.

[0004] However, the rolling of cigarettes generally requires a sufficient quantity of tobacco leaves on the cigarette production line to meet the rolling requirements. Therefore, current testing methods are characterized by a relatively large requirement for the quantity of tobacco leaves used in cigarettes and the long smoking time on the cigarette-rolling machine. However, due to the insufficient supply of tobacco leaves for tar testing of cured tobacco leaves, especially for tobacco varieties, on the cigarette production line, subsequent testing methods fail to meet the required conditions. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a collection device and a detection device for tar in tobacco, so as to establish a method for detecting tar in flue-cured tobacco leaves without the need for cigarettes, which is convenient for the detection of a large number of experimental samples and a small amount of tobacco leaves for each sample, so as to meet the needs of convenient detection.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, this utility model provides a device for collecting tar in tobacco, the device comprising:

[0008] Tobacco ignition device and tar collection unit;

[0009] The tar collection unit is connected to an air extraction device;

[0010] The tar collection unit includes: a collection chamber and an adsorption filter sheet disposed within the collection chamber;

[0011] The inner wall of the collection chamber is provided with a hydrophobic coating.

[0012] The collection device provided by this utility model is a rapid tobacco tar detection device based on the principles of vacuum and solid-liquid separation. By simulating the combustion environment of cigarettes and quantifying the amount of tar released, it achieves rapid and low-cost detection of the tar content of tobacco leaves. The detection results are highly consistent with those of the traditional cigarette rolling method.

[0013] As a preferred technical solution of this utility model, the tobacco ignition device includes: a tobacco leaf ignition device and / or a tobacco shred ignition device.

[0014] As a preferred technical solution of this utility model, the area of ​​the collection port of the tar collection unit is greater than or equal to the area of ​​the ignition area of ​​the tobacco ignition device.

[0015] As a preferred technical solution of this utility model, the air extraction device includes: a vacuum pumping device and a vacuum buffer device connected in sequence.

[0016] As a preferred technical solution of this utility model, the vacuum buffer device is connected to the tar collection unit.

[0017] As a preferred technical solution of this utility model, the vacuum buffer device is connected to the collection chamber after the adsorption filter along the airflow direction.

[0018] As a preferred technical solution of this utility model, the thickness of the hydrophobic coating is 0.5-1mm.

[0019] As a preferred technical solution of this utility model, the filter pore diameter of the adsorption filter is 0.5-1.5μm.

[0020] Secondly, this utility model provides a device for detecting tar in tobacco, the device comprising: a quantitative analysis module and a collection device as described in the first aspect.

[0021] As a preferred technical solution of this utility model, the quantitative analysis module includes: a weighing device and a calculation and analysis device.

[0022] Compared with existing technical solutions, this utility model has the following beneficial effects:

[0023] (1) Breaking the dependence on cigarette rolling and simplifying the testing process: Traditional methods require tobacco leaves to be rolled into cigarettes before combustion and smoke collection, which takes several hours to several days and requires specialized combustion equipment and complex operations. This utility model simulates the combustion environment through a vacuum filtration system, directly using tobacco powder as the testing object, eliminating the rolling and combustion steps, and improving efficiency by more than 80%.

[0024] (2) Low cost and low barrier to entry: Existing technologies rely on expensive equipment such as gas chromatographs and mass spectrometers, and require professional personnel to perform chemical pretreatment (such as solvent extraction and centrifugation). This utility model uses conventional laboratory equipment (vacuum pump, Buchner funnel) combined with quantitative weighing method, and the detection cost is only 1 / 5 of the traditional method. Moreover, the operators do not need complicated training and can be completed by ordinary technicians.

[0025] (3) High precision and reliability: By optimizing the filter pore size and the design of the hydrophobic coating collection bottle, tar adsorption loss is effectively reduced, ensuring that the detection error is ≤3%. The data from the examples show that the tar difference rate between tobacco leaves A and B (44.6%) is consistent with the trend of the traditional cigarette rolling method (30.5%), and the detection difference of coarse cigarette samples is only 2.8%, which is highly consistent with the traditional method (1.8%), verifying the accuracy of the device. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the tar collection device in tobacco according to an embodiment of this utility model.

[0027] In the diagram: 100 - tobacco ignition device, 210 - collection chamber, 220 - adsorption filter, 300 - air extraction device.

[0028] The present invention will now be described in further detail. However, the examples described below are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be determined by the claims. Detailed Implementation

[0029] To better illustrate this utility model and facilitate understanding of its technical solution, typical but non-limiting embodiments of this utility model are as follows:

[0030] I. This embodiment provides a device for collecting tar in tobacco, such as... Figure 1 As shown, the collection device includes:

[0031] Tobacco ignition device 100 and tar collection unit;

[0032] The tar collection unit is connected to an air extraction device 300;

[0033] The tar collection unit includes: a collection chamber 210 and an adsorption filter 220 disposed within the collection chamber 210;

[0034] The inner wall of the collection chamber 210 is provided with a hydrophobic coating.

[0035] In this utility model, the tobacco ignition device 100 is designed with different ignition devices according to the shape of the tobacco, or uses a common ignition device. The specific shape of the tobacco leaf can be tobacco leaf, tobacco shreds, etc.

[0036] In this utility model, the air extraction device 300 refers to a device capable of creating negative pressure, such as a vacuum pump.

[0037] In this invention, the specific process of collecting tar in the flue gas is as follows: After the tobacco ignition device 100 ignites the tobacco to form flue gas, the flue gas is drawn into the collection chamber 210 under the negative pressure formed by the suction device 300, and then passes through the adsorption filter 220. The tar in the flue gas is adsorbed on the adsorption filter 220, thereby realizing the collection of tar.

[0038] The tobacco ignition device 100 includes: a tobacco leaf ignition device and / or a tobacco shred ignition device.

[0039] Wherein, the area of ​​the collection port of the tar collection unit is greater than or equal to the area of ​​the ignition area of ​​the tobacco ignition device 100.

[0040] The vacuum pumping device 300 includes a vacuum pumping device and a vacuum buffer device connected in sequence.

[0041] The vacuum buffer device is connected to the tar collection unit.

[0042] Along the airflow direction, the vacuum buffer device is connected to the collection chamber 210 after the adsorption filter 220.

[0043] The thickness of the hydrophobic coating is 0.5-1mm, for example, it can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm, but is not limited to the listed values. Other unlisted values ​​within this range also meet the requirements.

[0044] The pore diameter of the adsorption filter 220 is 0.5-1.5μm, for example, it can be 0.5μm, 0.6μm, 0.7μm, 0.8μm, 0.9μm, 1μm, 1.1μm, 1.2μm, 1.3μm, 1.4μm or 1.5μm, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0045] II. This embodiment provides a device for detecting tar in tobacco, the device comprising: a quantitative analysis module and a collection device;

[0046] The quantitative analysis module includes weighing equipment and calculation and analysis equipment.

[0047] The collection device includes: a tobacco ignition device 100 and a tar collection unit;

[0048] The tar collection unit is connected to an air extraction device 300;

[0049] The tar collection unit includes: a collection chamber 210 and an adsorption filter 220 disposed within the collection chamber 210;

[0050] The inner wall of the collection chamber 210 is provided with a hydrophobic coating.

[0051] The tobacco ignition device 100 includes: a tobacco leaf ignition device and / or a tobacco shred ignition device.

[0052] Wherein, the area of ​​the collection port of the tar collection unit is greater than or equal to the area of ​​the ignition area of ​​the tobacco ignition device 100.

[0053] The vacuum pumping device 300 includes a vacuum pumping device and a vacuum buffer device connected in sequence.

[0054] The vacuum buffer device is connected to the tar collection unit.

[0055] Along the airflow direction, the vacuum buffer device is connected to the collection chamber 210 after the adsorption filter 220.

[0056] The thickness of the hydrophobic coating is 0.5-1mm, for example, it can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm, but is not limited to the listed values. Other unlisted values ​​within this range also meet the requirements.

[0057] The pore diameter of the adsorption filter 220 is 0.5-1.5μm, for example, it can be 0.5μm, 0.6μm, 0.7μm, 0.8μm, 0.9μm, 1μm, 1.1μm, 1.2μm, 1.3μm, 1.4μm or 1.5μm, but is not limited to the listed values. Other unlisted values ​​within this range are also acceptable.

[0058] For example, the detection process is as follows:

[0059] The tobacco sample to be tested was placed in a constant temperature and humidity chamber for equilibration. The temperature was controlled at 22±1℃ and the relative humidity at 60±3%. The equilibration lasted for 48 hours. A hygrometer calibrated with traceable standard parts was used to verify the relative humidity of the atmosphere around the sample or specimen to determine whether the sample met the test standard.

[0060] Place a glass fiber filter of suitable size on the inner wall of the collection chamber 210. The bottom is a double-layer glass fiber filter. Remove all the glass fiber filters, place them in a desiccator, seal it, and after equilibration for 24 hours, weigh them precisely and then assemble them into the collection chamber 210.

[0061] Accurately weigh the balanced tobacco sample, place it on the lifting platform, start the vacuum equipment, ignite the sample, collect the smoke, and immediately weigh the glass fiber filter after combustion, accurate to 0.1 mg. Check the back of each filter for yellow spots caused by filter penetration or damage. If there are any, discard them.

[0062] Fold the filter sheet inward twice with tweezers, and place the folded filter sheet into a dry Erlenmeyer flask. Each time, wipe the inner wall of the Buchner funnel with a quarter filter sheet, place it in the Erlenmeyer flask, add 50 mL of isopropanol, seal, and place in the dark for at least 4 hours (or shake on an electromagnetic shaker for 20 minutes). Detect the total alkaloids in the sample using spectrophotometry according to YC / T36 standard. Determine the moisture content using the Karl Fischer method according to YC / T156 standard.

[0063] The tar content in the sample to be tested is calculated using the following formula:

[0064] Tar=m TPM -m W1 -m W2

[0065] In the formula, m TPM The mass is the total particulate matter, expressed in milligrams (mg); m W1 Water content in total particulate matter, expressed in milligrams (mg); m W2 Total alkaloids in total particulate matter, expressed in milligrams (mg).

[0066] III. To illustrate the effects of the tobacco tar collection and detection device provided by this utility model, the following practical example is used for explanation:

[0067] Example 1

[0068] This embodiment provides a process for detecting tar in cured tobacco leaves without the need to roll cigarettes. The collection device and convenient method for detecting tar content are detailed below:

[0069] The detection device includes: a quantitative analysis module and a collection device;

[0070] The quantitative analysis module includes: weighing equipment and computational analysis equipment;

[0071] The collection device includes: a tobacco ignition device and a tar collection unit;

[0072] The tar collection unit is connected to an air extraction device;

[0073] The tar collection unit includes: a collection chamber and an adsorption filter disposed within the collection chamber; the inner wall of the collection chamber is provided with a hydrophobic coating; the tobacco ignition device includes: a tobacco ignition device; the area of ​​the collection port of the tar collection unit is equal to the area of ​​the ignition area of ​​the tobacco ignition device; the air extraction device includes: a vacuum extraction device and a vacuum buffer device connected in sequence, and the vacuum buffer device is connected to the collection chamber after the adsorption filter along the airflow direction.

[0074] The thickness of the hydrophobic coating is 1 mm;

[0075] The adsorption filter is a glass fiber filter with a filter diameter of 1 μm.

[0076] The samples and results are as follows:

[0077] (1) Determination of tar content in cigarettes.

[0078] The tar content of finished cigarette samples (A and B) of slim cigarette type was determined. The number of cigarettes required for a single determination was 25, and 5 replicates were set up for each. The results are shown in Table 1.

[0079] Table 1

[0080]

[0081] Table 1 shows that the average weights of the filters before adsorption were 0.3214g and 0.3251g, respectively, and the average weights of the tobacco shreds were 9.2103g and 9.2812g, respectively. The weights of the filters after adsorption were 0.4175g and 0.5000g, respectively. The measured tar content of smoking machine A was 5.58mg / cigarette, and the tar content determined by the rapid detection method of this invention was 1.04%; the measured tar content of smoking machine B was 8.03mg / cigarette, and the tar content determined by the rapid detection method of this invention was 1.88%.

[0082] (2) Determination of tar content in cigarettes.

[0083] The tar content of finished cigarette samples (C and D) of medium-length cigarette type was determined. The number of cigarettes required for a single determination was 25, and 5 replicates were set up for each. The results are shown in Table 2.

[0084] Table 2

[0085]

[0086] Table 2 shows that the average weights of the filters before adsorption were 0.3221g and 0.3297g, respectively, and the average weights of the tobacco shreds were 10.6862g and 11.0682g, respectively. The weights of the filters after adsorption were 0.4943g and 0.4875g, respectively. The measured tar content of smoking machine C was 9.44mg / cigarette, and the tar content determined by the rapid detection method of this invention was 1.61%; the measured tar content of smoking machine D was 8.40mg / cigarette, and the tar content determined by the rapid detection method of this invention was 1.43%.

[0087] (3) Determination of tar content in coarse cigarettes.

[0088] The tar content of finished cigarette samples (E and F) of the coarse cigarette type was determined. The number of cigarettes required for a single determination was 25, and 5 replicates were set up for each. The results are shown in Table 3.

[0089] Table 3

[0090]

[0091] The average weights of the filters before adsorption were 0.3215g and 0.3223g, respectively, and the average weights of the tobacco shreds were 16.3521g and 16.2349g, respectively. The weights of the filters after adsorption were 0.4911g and 0.4963g, respectively. The measured tar content of cigarette smoker E was 11.46mg / cigarette, and the tar content determined by the rapid detection method of this invention was 1.04%; the measured tar content of cigarette smoker F was 11.25mg / cigarette, and the tar content determined by the rapid detection method of this invention was 1.07%.

[0092] Convert the tar content (%) in Tables 1, 2, and 3 to mg / g using the following formula:

[0093] Tar content (mg / g) = ((tar + filter weight) - filter weight) × 1000 ÷ tobacco weight

[0094] By comparison, we can see that:

[0095] (1) The actual tar content of cigarette type A is 2.45 mg / cigarette lower than that of cigarette B, a reduction of 30.5%. Using the rapid tar detection device provided by this utility model, the tar content of A is 8.4 mg / g lower than that of B, a reduction of 44.6%.

[0096] (2) The tar content of smoking machine of medium-sized cigarette type C is 1.04 mg / cigarette higher than that of D, an increase of 12.4%. The tar content of C measured by the rapid tar content detection device is 1.8 mg / g higher than that of D, an increase of 12.5%.

[0097] (3) The tar content of smoking machines for coarse cigarette types E and F differed by only 1.8%, which was basically the same. The tar content of the two types measured by the rapid tar detection device differed by only 2.8%, which was basically consistent with the actual measurement results. This shows that the newly developed rapid tar detection device can easily, quickly and accurately detect the relative tar content of tobacco leaves. It can be seen that the design is reasonable, the detection process is simple and convenient, and the time consumption is short.

[0098] In summary, this invention, through structural integration, process standardization, and rapid detection, solves the problems of long cycles, high costs, and complex operations associated with traditional technologies. It provides tobacco companies with an efficient, economical, and reliable tool for detecting tar content, which can be widely applied in areas such as tobacco leaf raw material screening, processing technology optimization, and product quality control. This invention is used for tar detection in cured tobacco leaves, but is not limited to cured tobacco leaves; it should include tar detection related to the tobacco industry, such as tobacco shreds and flakes.

[0099] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0100] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0101] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A tobacco tar collecting device, characterized by, The collection device includes: Tobacco ignition device and tar collection unit; The tar collection unit is connected to an air extraction device; The tar collection unit includes: a collection chamber and an adsorption filter sheet disposed within the collection chamber; The inner wall of the collection chamber is provided with a hydrophobic coating.

2. The collection device of claim 1, wherein, The tobacco ignition device includes: a tobacco leaf ignition device and / or a tobacco shred ignition device.

3. The collection device of claim 1, wherein, The area of ​​the collection port of the tar collection unit is greater than or equal to the area of ​​the ignition area of ​​the tobacco ignition device.

4. The collection device as described in claim 1, characterized in that, The air extraction equipment includes a vacuum pumping device and a vacuum buffer device connected in sequence.

5. The collection device of claim 4, wherein, The vacuum buffer device is connected to the tar collection unit.

6. The collection device of claim 5, wherein, Along the direction of airflow, the vacuum buffer device is connected to the collection chamber after the adsorption filter.

7. The collection device of claim 1, wherein, The thickness of the hydrophobic coating is 0.5-1 mm.

8. The collection device of claim 1, wherein, The pore diameter of the adsorption filter is 0.5-1.5 μm.

9. A device for detecting tobacco tar, characterized by The detection device includes: a quantitative analysis module and a collection device as described in any one of claims 1-8.

10. The detection device as described in claim 9, characterized in that, The quantitative analysis module includes: weighing equipment and calculation and analysis equipment.

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