Method of adding smoke generating agent to tobacco shreds and heated cigarette

Abstract

The application discloses a method for adding a smoke generating agent to tobacco shreds and a heated cigarette. The method for adding the smoke generating agent to the tobacco shreds comprises the following steps: increasing the moisture content of natural tobacco leaves to a first preset concentration; cutting the natural tobacco leaves to obtain tobacco shreds; reducing the moisture content of the tobacco shreds to a second preset concentration; increasing the temperature of the tobacco shreds to a preset temperature; performing drum drying treatment on the tobacco shreds; and adding the smoke generating agent to the tobacco shreds after the drum drying treatment. The application can obtain tobacco shreds to which the smoke generating agent is more uniformly applied.

Description

TECHNICAL FIELD

[0001] The present application relates to a method for adding a smoking agent to tobacco shreds and a heated cigarette, and belongs to the technical field of cigarette processing. BACKGROUND

[0002] Compared with traditional cigarettes, heated cigarettes generate smoke through a smoking agent. If the content of the smoking agent in the tobacco shreds is uneven, the smoke generation will be unstable during smoking. According to research, in order to apply natural tobacco leaves to heated cigarettes, the uniformity of the smoking agent in the tobacco shreds needs to be improved to avoid the problem of smoke generation quality caused by uneven distribution of the smoking agent during smoking. The current related patents focus on reconstituted tobacco leaves, while the present application focuses on the mode of adding a smoking agent to natural tobacco leaves, which is more difficult than the mode of adding a smoking agent to reconstituted tobacco leaves.

[0003] In the production process of tobacco shreds, a large amount of smoking agent is added. However, the current adding method results in poor uniformity of the smoking agent in the tobacco shreds, leading to poor stability of smoke generation during smoking.

[0004] Therefore, the present application provides a method for adding a smoking agent to tobacco shreds and a heated cigarette. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a method for adding a smoking agent to tobacco shreds and a heated cigarette, which can improve the uniformity of the distribution of the smoking agent in the tobacco shreds and improve the uniformity of the distribution of the smoking agent in the heated cigarette.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] On the one hand, the present application provides a method for adding a smoking agent to tobacco shreds, comprising the following steps:

[0008] increasing the moisture content of the natural tobacco leaves to a first preset concentration;

[0009] cutting the natural tobacco leaves into shreds to obtain tobacco shreds;

[0010] decreasing the moisture content of the tobacco shreds to a second preset concentration;

[0011] increasing the temperature of the tobacco shreds to a preset temperature;

[0012] performing drum drying treatment on the tobacco shreds;

[0013] adding the smoking agent to the tobacco shreds after the drum drying treatment.

[0014] Further, the first preset concentration is 20-28wt%;

[0015] Further, the step of increasing the moisture content of the natural tobacco leaves to a first preset concentration comprises:

[0016] The tobacco leaves are subjected to vacuum conditioning, loose conditioning and water addition treatment to increase the moisture content of the tobacco leaves to a first preset concentration.

[0017] Further, the increasing the moisture of the natural tobacco leaves to the first preset concentration comprises:

[0018] The tobacco leaves are subjected to vacuum conditioning to increase the moisture content of the tobacco leaves to 16-18wt%.

[0019] The tobacco leaves are subjected to loose conditioning to increase the moisture content of the tobacco leaves to 17-19wt%.

[0020] The tobacco leaves are subjected to water addition treatment to increase the moisture content of the tobacco leaves to 20-28wt%.

[0021] Further, the increasing the moisture of the natural tobacco leaves to the first preset concentration comprises:

[0022] The tobacco leaves are subjected to vacuum conditioning at a vacuum degree of 7-9℃ and a humidification temperature of 55-65℃ for a holding time of 90-180s to increase the moisture content of the tobacco leaves to 16-18wt%.

[0023] The tobacco leaves are subjected to loose conditioning at a hot air temperature of 55-65℃ and a mass ratio of added water to tobacco of 0-2% to increase the moisture content of the tobacco leaves to 17-19wt%.

[0024] The tobacco leaves are subjected to water addition treatment at a liquor temperature of 50-60℃, a mass ratio of added water to tobacco of 5-26% and a rotation speed of 8-11rpm and an atomized steam pressure of 0.3-0.6bar to increase the moisture content of the tobacco leaves to 20-28wt%.

[0025] Further, the cutting the natural tobacco leaves to obtain tobacco shreds with a width of 0.7-1.1mm.

[0026] Further, the second preset concentration is 10.0-13.0wt%.

[0027] Further, the decreasing the moisture content of the tobacco shreds to the second preset concentration comprises:

[0028] The tobacco shreds are subjected to high-temperature pneumatic drying treatment at a steam temperature of 200-280℃ and an anti-briquetting steam of 0.1-1bar to decrease the moisture content of the tobacco shreds to the second preset concentration.

[0029] Further, the increasing the temperature of the tobacco shreds to a preset temperature comprises:

[0030] The tobacco shreds are subjected to temperature-increasing conditioning at a steam flow of 68kg / h to increase the temperature of the tobacco shreds to 80℃±6.

[0031] Further, the drum drying process of the tobacco shreds includes:

[0032] The drum drying process of the tobacco shreds reduces the moisture content of the tobacco shreds to 0-5wt%;

[0033] The dried tobacco shreds are stored for 4-24h.

[0034] Further, the storage environment of the dried tobacco shreds is:

[0035] The storage environment temperature of the dried tobacco shreds is 25-29℃;

[0036] Further, the storage environment humidity of the dried tobacco shreds is 50-60%.

[0037] Further, during the drum drying process:

[0038] The production negative pressure is -23-15mbar;

[0039] Further, the drum wall temperature is 130-150℃;

[0040] Further, the drum rotation speed is 15-19rpm;

[0041] Further, the hot air temperature is 130-150℃;

[0042] Further, the hot air speed is 0.2-0.6m / s;

[0043] Further, the moisture removal negative pressure is -21-15mbar.

[0044] Further, the adding of the smoking agent to the drum dried tobacco shreds includes:

[0045] A plurality of smoking agent nozzles are arranged above the drum of the flavoring machine, each of the smoking agent nozzles sprays the smoking agent to uniformly add the smoking agent to the tobacco shreds in the drum of the flavoring machine;

[0046] The tobacco shreds with the added smoking agent are stored for 3-48h.

[0047] Further, during the adding of the smoking agent:

[0048] The weight ratio of the smoking agent to the tobacco shreds is 15-20wt%;

[0049] Further, the flow rate of the smoking agent is 60-80kg / h;

[0050] Further, the temperature of the smoking agent is normal temperature;

[0051] Further, the pressure of the atomizing compressed air is 1-4bar.

[0052] Further, the storage environment for the cut tobacco after adding the smoking agent is:

[0053] The storage environment temperature for the cut tobacco after adding the smoking agent is 26-32 DEG C.

[0054] Further, the storage environment humidity for the cut tobacco after adding the smoking agent is 50-60%.

[0055] Further, the step of adding the smoking agent to the cut tobacco after the drum drying treatment further comprises a storage in a box.

[0056] The storage environment for the storage in the box is:

[0057] The storage environment temperature for the storage in the box is 26-32 DEG C.

[0058] Further, the storage environment humidity for the storage in the box is 25-40%.

[0059] Further, the storage time for the storage in the box is 24-240 hours.

[0060] In another aspect, the present application provides a heated cigarette, wherein a smoking agent is added to cut tobacco of the heated cigarette.

[0061] The method for adding the smoking agent is the method for adding the smoking agent to the cut tobacco as described above.

[0062] Compared with the prior art, the present application has the following beneficial effects:

[0063] By regulating the moisture content of the tobacco leaves, cutting the tobacco leaves, regulating the moisture content and temperature of the cut tobacco, the cut tobacco can absorb the smoking agent more uniformly, and the smoking agent can be distributed more uniformly in the cut tobacco.

[0064] The heated cigarette is prepared by using the cut tobacco with uniformly distributed smoking agent, and the heated cigarette with uniformly distributed smoking agent is obtained, thereby improving the experience of consumers.

[0065] The absorption rate of the smoking agent by the cut tobacco obtained by the method of the present application can be up to 91.6%, and therefore, the method of the present application can improve the utilization rate of the smoking agent and save the process cost; the variation coefficient of the absorption of the smoking agent by the cut tobacco in each section of the cigarette is as low as 1.40%, and therefore, the smoking agent is uniformly distributed in the cut tobacco in each section of the heated cigarette, i.e., the cut tobacco obtained by the method of the present application can uniformly absorb the smoking agent and obtain cut tobacco with uniformly distributed smoking agent; after the production of the heated cigarette is divided into portions, sampling and detection are performed, and the variation coefficient (CV) of the content of the smoking agent in the cut tobacco of each heated cigarette is as low as 1.50%, and therefore, the smoking agent is uniformly distributed in the cut tobacco of the heated cigarette, i.e., the cut tobacco obtained by the method of the present application can improve the uniformity of the smoking agent in the heated cigarette. BRIEF DESCRIPTION OF DRAWINGS

[0066] Figure 1 An embodiment flow chart of the method for adding smoking agent to tobacco shreds according to the present application is shown. DETAILED DESCRIPTION

[0067] The present application will be further described below with reference to the drawings. The following examples are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0068] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0069] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", and "connection" should be broadly understood, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0070] The present application provides a method for adding smoking agent to tobacco shreds.

[0071] The method for adding smoking agent to tobacco shreds according to the present application comprises the following steps, referring to Figure 1 :

[0072] S1, increasing the moisture content of the natural tobacco leaves to a first preset concentration to increase the processing resistance of the tobacco leaves.

[0073] S2, cutting the natural tobacco leaves to obtain tobacco shreds to improve the dehydration efficiency of the tobacco shreds and ensure the leaf structure in the subsequent steps.

[0074] S3, reducing the moisture content of the tobacco shreds to a second preset concentration to shorten the dehydration time of the tobacco shreds and improve the leaf structure.

[0075] S4 raises the temperature of the tobacco to a preset temperature to improve the processing resistance of the tobacco.

[0076] S5 performs drum drying treatment on the tobacco to further remove moisture from the tobacco and improve the structure of the tobacco.

[0077] S6 adds the smoking agent to the tobacco after the drum drying treatment to allow the tobacco to uniformly absorb the smoking agent.

[0078] The present application can make the tobacco absorb the smoking agent more uniformly by regulating the moisture content of the tobacco leaves, cutting the tobacco leaves, regulating the moisture content and temperature of the tobacco, and making the smoking agent more uniformly distributed in the tobacco.

[0079] In some preferred embodiments, a method for adding a smoking agent to tobacco includes the following steps:

[0080] S1 increases the moisture content of the natural tobacco leaves to a first preset concentration to improve the processing resistance of the tobacco leaves.

[0081] In application, the tobacco leaves are subjected to vacuum moisture conditioning, loose moisture conditioning, and water addition treatment to increase the moisture content of the tobacco leaves to the first preset concentration, which is any value in the range of 20-28wt%.

[0082] In actual application, the tobacco leaves are subjected to vacuum moisture conditioning at a vacuum degree of any value in the range of 7-9℃, a humidification temperature of any value in the range of 55-65℃, and a holding time of any value in the range of 90-180s to increase the moisture content of the tobacco leaves to any value in the range of 16-18wt%. The tobacco leaves are subjected to loose moisture conditioning at a hot air temperature of any value in the range of 55-65℃ and a mass ratio of added water to tobacco of any value in the range of 0-2% to increase the moisture content of the tobacco leaves to any value in the range of 17-19wt%. The tobacco leaves are subjected to water addition treatment at a liquor temperature of any value in the range of 50-60℃, a mass ratio of added water to tobacco of any value in the range of 5-26%, a rotation speed of any value in the range of 8-11rpm, and an atomized steam pressure of any value in the range of 0.3-0.6bar to increase the moisture content of the tobacco leaves to any value in the range of 20-28wt%.

[0083] S2 cuts the natural tobacco leaves to obtain tobacco to improve the dehydration efficiency of the tobacco and ensure the structure of the tobacco.

[0084] In application, the natural tobacco leaves are cut to obtain tobacco with a width of any value in the range of 0.7-1.1mm.

[0085] S3 reduces the moisture content of the tobacco to a second preset concentration to shorten the dehydration time of the tobacco and improve the structure of the tobacco.

[0086] In use, the cut tobacco is subjected to high-temperature air flow drying treatment: the steam temperature is any value in the range of 200-280℃, the anti-caking steam is any value in the range of 0.1-1 bar, the moisture content of the cut tobacco is reduced to a second preset concentration, and the second preset concentration is any value in the range of 10.0-13.0wt%.

[0087] S4, the temperature of the cut tobacco is raised to a preset temperature to improve the processing resistance of the cut tobacco.

[0088] In use, the cut tobacco is subjected to temperature-increasing and moisture-increasing treatment: the steam flow is 68kg / h, the temperature of the cut tobacco is raised to a preset temperature, and the preset temperature is 80℃±6.

[0089] S5, the cut tobacco is subjected to drum drying treatment to further remove the moisture of the cut tobacco and improve the leaf structure.

[0090] In use, the cut tobacco is subjected to drum drying treatment to reduce the moisture content of the cut tobacco to any value in the range of 0-5wt%, further remove the moisture of the cut tobacco, improve the leaf structure, and, in addition, the dried cut tobacco is stored for any value in the range of 4-24h to cool the cut tobacco and improve the processing resistance of the cut tobacco in the next processing step.

[0091] In the drum drying treatment process, the following conditions are met:

[0092] The production negative pressure is any value in the range of -23-15mbar;

[0093] The drum wall temperature is any value in the range of 130-150℃;

[0094] The drum rotation speed is any value in the range of 15-19rpm;

[0095] The hot air temperature is any value in the range of 130-150℃;

[0096] The hot air speed is any value in the range of 0.2-0.6m / s;

[0097] The moisture removal negative pressure is any value in the range of -21-15mbar.

[0098] In the storage environment of the dried cut tobacco, the following conditions are met:

[0099] The storage environment temperature of the dried cut tobacco is any value in the range of 25-29℃;

[0100] The storage environment humidity of the dried cut tobacco is any value in the range of 50-60%.

[0101] S6, the smoke-producing agent is added to the cut tobacco after the drum drying treatment to make the cut tobacco uniformly absorb the smoke-producing agent.

[0102] In application, a plurality of smoke generating agent nozzles are arranged above the flavoring machine roller, and the smoke generating agent is sprayed in each smoke generating agent nozzle to uniformly add the smoke generating agent into the cut tobacco in the flavoring machine roller, so that the smoke generating agent is uniformly distributed in the cut tobacco. In addition, the cut tobacco to which the smoke generating agent is added is stored for 3-48 hours by the person skilled in the art, so that the cut tobacco uniformly absorbs the smoke generating agent.

[0103] In the process of adding the smoke generating agent:

[0104] The weight ratio of the smoke generating agent to the cut tobacco is any value in the range of 15-20 wt%;

[0105] The flow rate of the smoke generating agent is any value in the range of 60-80 kg / h;

[0106] The temperature of the smoke generating agent is room temperature;

[0107] The pressure of the atomizing compressed air is any value in the range of 1-4 bar;

[0108] The flow rate of the cut tobacco is 400 kg / h;

[0109] The rotation speed of the flavoring machine roller is 10 rpm.

[0110] In the process of adding the smoke generating agent:

[0111] The storage environment temperature for the cut tobacco to which the smoke generating agent is added is any value in the range of 26-32℃;

[0112] The storage environment humidity for the cut tobacco to which the smoke generating agent is added is any value in the range of 50-60%;

[0113] In actual application, after the step of adding the smoke generating agent to the cut tobacco after the roller drying process, a boxing storage step is further included to further improve the uniformity of the cut tobacco in absorbing the smoke generating agent.

[0114] In the process of adding the smoke generating agent:

[0115] The boxing storage environment temperature is any value in the range of 26-32℃;

[0116] The boxing storage environment humidity is any value in the range of 25-40%;

[0117] The boxing storage time is any value in the range of 24-240 hours.

[0118] The person skilled in the art can use the cut tobacco obtained by the above method of adding the smoke generating agent to the cut tobacco to prepare a heated cigarette, so that a heated cigarette with uniformly distributed smoke generating agent is obtained, and the experience of consumers is improved.

[0119] Comparative Example 1:

[0120] S1: The moisture content of the natural tobacco leaf is increased to a first preset concentration.

[0121] First, the tobacco leaves are subjected to vacuum conditioning and loose conditioning to increase the moisture content of the tobacco leaves to 19wt%;

[0122] Then, the tobacco leaves are subjected to smoke generating agent addition: the flow rate of the tobacco leaves is controlled to be 400 kg / h, the atomization pressure is 0.5 bar, the addition amount of the smoke generating agent is 80 kg, the smoke generating agent is heated to 58℃, and the moisture content of the tobacco leaves added with the smoke generating agent is increased to 28wt%;

[0123] The tobacco leaves added with the smoke generating agent are stored in an environment with an ambient temperature of 26℃ and an ambient humidity of 70% for 12h.

[0124] S2, the natural tobacco leaves are cut to obtain tobacco shreds.

[0125] The tobacco leaves are cut to control the width of the tobacco shreds to be 1.0mm.

[0126] S3, the moisture content of the tobacco shreds is reduced to a second preset concentration.

[0127] The tobacco shreds are subjected to high-temperature air flow drying: the steam temperature is 240℃, and the anti-briquetting steam is 0.2bar, so that the moisture content of the tobacco shreds is reduced to 13.0wt%.

[0128] S4, the temperature of the tobacco shreds is increased to a preset temperature.

[0129] The tobacco shreds are subjected to temperature-increasing and moisture-increasing treatment: the steam flow rate is 68kg / h, and the temperature of the tobacco shreds is increased to 80℃±6.

[0130] S5, the tobacco shreds are subjected to drum drying.

[0131] The tobacco shreds are subjected to drum drying: the production negative pressure is-20mbar, the drum wall temperature is 150℃, the drum rotation speed is 15rpm, the hot air temperature is 150℃, the hot air speed is 0.6m / s, and the moisture removal negative pressure is-21mbar, so that the moisture content of the tobacco shreds is reduced to 5wt%.

[0132] The dried tobacco shreds are stored in an environment with an ambient temperature of 26℃ and an ambient humidity of 60% for 24h.

[0133] In application, the tobacco shreds obtained by the above method are used to produce heat-not-burn cigarettes, the cigarette rod part of the heat-not-burn cigarettes is equally divided into 4 segments, and the amount of the smoke generating agent absorbed by the tobacco shreds in each segment is detected and recorded by gas chromatography.

[0134] In actual application, all the produced heat-not-burn cigarettes are packed into packs, 4 heat-not-burn cigarettes are sampled from each of the 4 small pack parts of the packs, and the amount of the smoke generating agent absorbed by the tobacco shreds of the heat-not-burn cigarettes in each small pack part is detected and recorded by gas chromatography, as shown in Table 1.

[0135] The four packet portions of the comparative example are arranged in two rows, and the distance between adjacent packet portions is 10 mm.

[0136] Example 1

[0137] S1 increases the moisture content of the natural tobacco leaves to a first preset concentration.

[0138] The tobacco leaves are first subjected to vacuum conditioning and loose conditioning to increase the moisture content of the tobacco leaves to 19 wt%;

[0139] The tobacco leaves are then subjected to water addition: the flow rate of the tobacco leaves is controlled to be 400 kg / h, the pressure of the atomizing compressed air is 0.5 bar, the amount of water added is 9 kg, the rotation speed is 8 rpm, and the moisture content of the tobacco leaves is increased to 28 wt%;

[0140] The tobacco leaves after the addition of the smoking agent are stored in an environment with an ambient temperature of 26°C and an ambient humidity of 70% for 4 h.

[0141] S2 cuts the natural tobacco leaves to obtain tobacco shreds.

[0142] The tobacco leaves are cut to control the width of the tobacco shreds to be 0.9 mm.

[0143] S3 reduces the moisture content of the tobacco shreds to a second preset concentration.

[0144] The tobacco shreds are subjected to high-temperature air flow drying: the steam temperature is 200°C, and the anti-caking steam is 0.4 bar, so that the moisture content of the tobacco shreds is reduced to 13.0 wt%.

[0145] S4 increases the temperature of the tobacco shreds to a preset temperature.

[0146] The tobacco shreds are subjected to temperature-increasing conditioning: the steam flow rate is 68 kg / h, and the temperature of the tobacco shreds is increased to 80°C±6.

[0147] S5 subjects the tobacco shreds to drum drying.

[0148] The tobacco shreds are subjected to drum drying: the production negative pressure is -20 mbar, the drum wall temperature is 130°C, the rotation speed of the drum is 15 rpm, the hot air temperature is 130°C, the hot air speed is 0.6 m / s, and the moisture removal negative pressure is -21 mbar, so that the moisture content of the tobacco shreds is reduced to 5 wt%.

[0149] The dried tobacco shreds are stored in an environment with an ambient temperature of 26°C and an ambient humidity of 60% for 24 h.

[0150] S6 adds a smoking agent to the tobacco shreds after the drum drying.

[0151] A plurality of smoke generating agent nozzles are arranged above the rolling drum of the flavoring machine, and the smoke generating agent is sprayed in each smoke generating agent nozzle to uniformly add the smoke generating agent to the tobacco in the rolling drum of the flavoring machine. During the smoke generating agent adding process, the tobacco flow is 400 kg / h, the flavoring drum rotating speed is 9 rpm, the atomizing pressure air pressure is 2.5 bar, and the weight ratio of the smoke generating agent to the tobacco is 20 wt%.

[0152] The tobacco with the added smoke generating agent is stored in an environment with an ambient temperature of 26°C and an ambient humidity of 60% for 10 h.

[0153] Finally, the produced tobacco is stored in a carton in an environment with an ambient temperature of 30°C and an ambient humidity of 30% for 72 h.

[0154] In application, the tobacco obtained by the above method is used by those skilled in the art to produce a heated cigarette, the cigarette portion of the heated cigarette is equally divided into four segments, and the amount of smoke generating agent absorbed by the tobacco in each segment of the cigarette portion is detected and recorded by gas chromatography.

[0155] In actual application, all the produced heated cigarettes are packed into a pack of cigarettes, four heated cigarettes are sampled from four small pack portions of the pack of cigarettes, and the amount of smoke generating agent absorbed by the tobacco in each small pack portion of the heated cigarette is detected and recorded by gas chromatography, as shown in Table 1.

[0156] The four small pack portions of the embodiment are arranged in two rows, and the spacing between adjacent small pack portions is 10 mm.

[0157] Example 2:

[0158] S1 increases the moisture content of the natural tobacco leaves to a first preset concentration.

[0159] First, the tobacco leaves are subjected to vacuum moisture conditioning and loose moisture conditioning, so that the moisture content of the tobacco leaves is increased to 19 wt%;

[0160] Then, the tobacco leaves are subjected to water adding treatment: the tobacco leaf flow is controlled to be 400 kg / h, the atomizing pressure air pressure is 0.5 bar, the water adding amount is 9 kg, the rotating speed is 8 rpm, and the moisture content of the tobacco leaves is increased to 28 wt%;

[0161] The tobacco leaves with the added smoke generating agent are stored in an environment with an ambient temperature of 26°C and an ambient humidity of 70% for 24 h.

[0162] S2 cuts the natural tobacco leaves to obtain tobacco.

[0163] The tobacco leaves are subjected to cutting treatment, and the width of the tobacco is controlled to be 0.9 mm.

[0164] S3 reduces the moisture content of the tobacco to a second preset concentration.

[0165] The cut tobacco is subjected to high-temperature air flow drying treatment: steam temperature is 240℃, anti-caking steam is 0.8bar, and the moisture content of the cut tobacco is reduced to 13.0wt%.

[0166] S4, the temperature of the cut tobacco is raised to a preset temperature.

[0167] The cut tobacco is subjected to temperature-increasing and moisture-increasing treatment: steam flow is 68kg / h, and the temperature of the cut tobacco is raised to 80℃±6.

[0168] S5, the cut tobacco is subjected to drum drying treatment.

[0169] The cut tobacco is subjected to drum drying treatment: production negative pressure is -23mbar, cylinder wall temperature is 150℃, drum rotation speed is 19rpm, hot air temperature is 150℃, hot air speed is 0.6m / s, and moisture removal negative pressure is -21mbar, so that the moisture content of the cut tobacco is reduced to 3wt%.

[0170] The dried cut tobacco is stored in an environment with an ambient temperature of 26℃ and an ambient humidity of 60% for 12h.

[0171] S6, the smoking agent is added to the cut tobacco after drum drying treatment.

[0172] A plurality of smoking agent nozzles are arranged above the drum of the flavoring machine, and the smoking agent is sprayed in each smoking agent nozzle to uniformly add the smoking agent to the cut tobacco in the drum of the flavoring machine. During the addition of the smoking agent, the cut tobacco flow is 400kg / h, the flavoring drum rotation speed is 11rpm, the atomization pressure air pressure is 2bar, and the weight ratio of the smoking agent to the cut tobacco is 18wt%.

[0173] The cut tobacco to which the smoking agent is added is stored in an environment with an ambient temperature of 26℃ and an ambient humidity of 60% for 24h.

[0174] Finally, the produced cut tobacco is stored in a carton in an environment with an ambient temperature of 30℃ and an ambient humidity of 30% for 72h.

[0175] In application, the cut tobacco obtained by the above method is used by those skilled in the art to produce heated cigarettes, the cigarette portion of the heated cigarettes is equally divided into 4 segments, and the amount of the smoking agent absorbed by the cut tobacco in each segment is detected and recorded by gas chromatography.

[0176] In actual application, all the produced heated cigarettes are packed into packs, 4 heated cigarettes are sampled from 4 small pack portions of each pack, and the amount of the smoking agent absorbed by the cut tobacco of the heated cigarettes in each small pack portion is detected and recorded by gas chromatography, as shown in Table 1.

[0177] The 4 small pack portions of the embodiment are arranged in two rows, and the spacing between adjacent small pack portions is 10mm.

[0178] Example 3:

[0179] S1 increases the moisture content of the natural tobacco leaves to a first preset concentration.

[0180] The tobacco leaves are first subjected to vacuum conditioning and loose conditioning to increase the moisture content of the tobacco leaves to 19wt%;

[0181] The tobacco leaves are then subjected to water addition: the flow rate of the tobacco leaves is controlled at 400kg / h, the pressure of the atomizing compressed air is 0.5bar, the amount of water added is 9kg, the rotation speed is 8rpm, and the moisture content of the tobacco leaves is increased to 28wt%;

[0182] The tobacco leaves after the addition of the smoking agent are stored in an environment with an ambient temperature of 26℃ and an ambient humidity of 70% for 36h.

[0183] S2 cuts the natural tobacco leaves to obtain tobacco shreds.

[0184] The tobacco leaves are subjected to cutting to control the width of the tobacco shreds at 0.9mm.

[0185] S3 reduces the moisture content of the tobacco shreds to a second preset concentration.

[0186] The tobacco shreds are subjected to high-temperature pneumatic drying: the steam temperature is 280℃, and the anti-caking steam is 1bar, so that the moisture content of the tobacco shreds is reduced to 10.0wt%.

[0187] S4 increases the temperature of the tobacco shreds to a preset temperature.

[0188] The tobacco shreds are subjected to temperature-increasing conditioning: the steam flow rate is 68kg / h, and the temperature of the tobacco shreds is increased to 80℃±6.

[0189] S5 subjects the tobacco shreds to drum drying.

[0190] The tobacco shreds are subjected to drum drying: the production negative pressure is -15mbar, the temperature of the drum wall is 130℃, the rotation speed of the drum is 19rpm, the temperature of the hot air is 130℃, the wind speed of the hot air is 0.6m / s, and the moisture removal negative pressure is -15mbar, so that the moisture content of the tobacco shreds is reduced to 3wt%.

[0191] The dried tobacco shreds are stored in an environment with an ambient temperature of 26℃ and an ambient humidity of 60% for 24h.

[0192] S6 adds a smoking agent to the tobacco shreds after the drum drying.

[0193] A plurality of smoke generating agent nozzles are arranged above the rolling drum of the flavoring machine, and the smoke generating agent is sprayed in each smoke generating agent nozzle to uniformly add the smoke generating agent to the tobacco in the rolling drum of the flavoring machine. During the smoke generating agent adding process, the tobacco flow is 400 kg / h, the flavoring drum rotating speed is 10 rpm, the atomization pressure air pressure is 1.5 bar, and the weight ratio of the smoke generating agent to the tobacco is 15 wt%.

[0194] The tobacco with the added smoke generating agent is stored in an environment with an ambient temperature of 26℃ and an ambient humidity of 60% for 24 h.

[0195] Finally, the produced tobacco is stored in a carton in an environment with an ambient temperature of 30℃ and an ambient humidity of 30% for 72 h.

[0196] In application, the tobacco obtained by the above method is used by those skilled in the art to produce a heating cigarette, the heating cigarette is divided into four sections at the cigarette position, and the amount of smoke generating agent absorbed by the tobacco in each section is detected and recorded by gas chromatography.

[0197] In actual application, all the produced heating cigarettes are packed into packs, four heating cigarettes are sampled from four small pack positions of each pack, and the amount of smoke generating agent absorbed by the tobacco in each small pack position is detected and recorded by gas chromatography, as shown in Table 1.

[0198] The four small pack positions of the embodiment are arranged in two rows, and the spacing between adjacent small pack positions is 10 mm.

[0199] Example 4:

[0200] S1 increases the moisture content of the natural tobacco leaves to a first preset concentration.

[0201] The tobacco leaves are subjected to vacuum moisture conditioning: the vacuum degree is 7℃, the humidification temperature is 55℃, and the holding time is 90 s, so that the moisture content of the tobacco leaves is increased to 16 wt%;

[0202] The tobacco leaves are subjected to loose moisture conditioning: the hot air temperature is 55℃, and the mass ratio of added water to tobacco is 2%, so that the moisture content of the tobacco leaves is increased to 17 wt%;

[0203] The tobacco leaves are subjected to material adding treatment: the material liquid temperature is 50℃, the mass ratio of added water to tobacco is 5%, the rotating speed is 11 rpm, and the atomization steam pressure is 0.3 bar, so that the moisture content of the tobacco leaves is increased to 20 wt%.

[0204] S2 cuts the natural tobacco leaves to obtain tobacco.

[0205] The tobacco leaves are subjected to cutting treatment, and the width of the tobacco is controlled to be 0.7 mm.

[0206] S3 reduces the moisture content of the tobacco to a second preset concentration.

[0207] The cut tobacco is subjected to high-temperature air flow drying treatment: steam temperature is 200℃, anti-briquetting steam is 0.1 bar, and the moisture content of the cut tobacco is reduced to 10.0wt%.

[0208] S4 The temperature of the cut tobacco is raised to a preset temperature.

[0209] The cut tobacco is subjected to temperature-increasing and moisture-increasing treatment: steam flow is 68kg / h, and the temperature of the cut tobacco is raised to 80℃±6.

[0210] S5 The cut tobacco is subjected to drum drying treatment.

[0211] The cut tobacco is subjected to drum drying treatment: production negative pressure is -23mbar, cylinder wall temperature is 130℃, drum rotating speed is 15rpm, hot air temperature is 130℃, hot air speed is 0.2m / s, and moisture removal negative pressure is -21mbar, so that the moisture content of the cut tobacco is reduced to 0.5wt%.

[0212] The dried cut tobacco is stored in an environment with an ambient temperature of 25℃ and an ambient humidity of 50% for 4h.

[0213] S6 The smoking agent is added to the cut tobacco after drum drying treatment.

[0214] A plurality of smoking agent nozzles are arranged above the drum of the flavoring machine, and the smoking agent is sprayed in each smoking agent nozzle to uniformly add the smoking agent to the cut tobacco in the drum of the flavoring machine. During the smoking agent adding process, the smoking agent flow is 60kg / h, the cut tobacco flow is 400kg / h, the flavoring drum rotating speed is 10rpm, the atomization compressed air pressure is 1bar, and the weight ratio of the smoking agent to the cut tobacco is 15wt%.

[0215] The cut tobacco after adding the smoking agent is stored in an environment with an ambient temperature of 26℃ and an ambient humidity of 50% for 3h.

[0216] Finally, the produced cut tobacco is stored in a carton in an environment with an ambient temperature of 26℃ and an ambient humidity of 25% for 120h.

[0217] In application, the cut tobacco obtained by the above method is used to produce heat-not-burn cigarettes. The cigarette rod part of the heat-not-burn cigarette is equally divided into four sections, and the amount of the smoking agent absorbed by the cut tobacco in each section is detected and recorded by gas chromatography.

[0218] In actual application, all the produced heat-not-burn cigarettes are packed into packs, 4 heat-not-burn cigarettes are sampled from each of the four small pack parts of the pack, and the amount of the smoking agent absorbed by the cut tobacco of the heat-not-burn cigarette in each small pack part is detected and recorded by gas chromatography, as shown in Table 1.

[0219] The four packet parts of the embodiment are arranged in two rows, and the distance between adjacent packet parts is 10 mm.

[0220] Example 5:

[0221] S1 increases the moisture content of the natural tobacco leaves to a first preset concentration.

[0222] The tobacco leaves are subjected to vacuum moisture conditioning: the vacuum degree is 9℃, the humidification temperature is 65℃, and the holding time is 180s, so that the moisture content of the tobacco leaves is increased to 18wt%;

[0223] The tobacco leaves are subjected to loose moisture conditioning: the hot air temperature is 65℃, and the mass ratio of added water to tobacco is 0.5%, so that the moisture content of the tobacco leaves is increased to 19wt%;

[0224] The tobacco leaves are subjected to seasoning treatment: the temperature of the seasoning solution is 60℃, the mass ratio of added water to tobacco is 26%, the rotation speed is 11rpm, and the atomized steam pressure is 0.6bar, so that the moisture content of the tobacco leaves is increased to 28wt%.

[0225] S2 cuts the natural tobacco leaves to obtain tobacco shreds.

[0226] The tobacco leaves are subjected to cutting treatment, and the width of the tobacco shreds is controlled to be 1.1mm.

[0227] S3 reduces the moisture content of the tobacco shreds to a second preset concentration.

[0228] The tobacco shreds are subjected to high-temperature air flow drying treatment: the steam temperature is 280℃, and the anti-briquetting steam is 1bar, so that the moisture content of the tobacco shreds is reduced to 13.0wt%.

[0229] S4 increases the temperature of the tobacco shreds to a preset temperature.

[0230] The tobacco shreds are subjected to temperature-increasing moisture conditioning: the steam flow is 68kg / h, so that the temperature of the tobacco shreds is increased to 80℃±6.

[0231] S5 subjects the tobacco shreds to drum drying treatment.

[0232] The tobacco shreds are subjected to drum drying treatment: the production negative pressure is 15mbar, the drum wall temperature is 150℃, the drum rotation speed is 19rpm, the hot air temperature is 150℃, the hot air speed is 0.6m / s, and the moisture removal negative pressure is 15mbar, so that the moisture content of the tobacco shreds is reduced to 3wt%.

[0233] The dried tobacco shreds are stored in an environment with an ambient temperature of 29℃ and an ambient humidity of 60% for 24h.

[0234] S6 adds a smoking agent to the tobacco shreds subjected to drum drying treatment.

[0235] A plurality of smoke generating agent nozzles are arranged above the drum of the flavoring machine, and the smoke generating agent is sprayed in each smoke generating agent nozzle to uniformly add the smoke generating agent into the cut tobacco in the drum of the flavoring machine. During the smoke generating agent adding process, the smoke generating agent flow is 80 kg / h, the cut tobacco flow is 400 kg / h, the flavoring drum rotating speed is 10 rpm, the atomization pressure air pressure is 4 bar, and the weight ratio of the smoke generating agent to the cut tobacco is 20 wt%.

[0236] The cut tobacco to which the smoke generating agent is added is stored in an environment with an ambient temperature of 32℃ and an ambient humidity of 60% for 48 h.

[0237] Finally, the produced cut tobacco is stored in a carton in an environment with an ambient temperature of 32℃ and an ambient humidity of 40% for 240 h.

[0238] In application, the cut tobacco obtained by the above method is used to produce a heated cigarette, the cigarette portion of the heated cigarette is equally divided into four segments, and the amount of the smoke generating agent absorbed by the cut tobacco in each segment of the cigarette portion is detected by gas chromatography.

[0239] In actual application, all the produced heated cigarettes are packed into packs, four heated cigarettes are sampled from four small pack portions of each pack, and the amount of the smoke generating agent absorbed by the cut tobacco in each small pack portion of the heated cigarette is detected by gas chromatography, as shown in Table 1.

[0240] The four small pack portions of the embodiment are arranged in two rows, and the spacing between adjacent small pack portions is 10 mm.

[0241] Table 1

[0242]

[0243] As can be seen from the above embodiments, the cut tobacco obtained by the method of the present application can absorb up to 91.6% of the externally added smoke generating agent, and therefore, the method of the present application can improve the utilization rate of the smoke generating agent and save process cost; in the heated cigarette produced by using the obtained cut tobacco, the variation coefficient of the smoke generating agent absorbed by the cut tobacco in each segment of the cigarette portion is as low as 1.40%, and therefore, the smoke generating agent is uniformly distributed in the cut tobacco in each segment of the heated cigarette, that is, the cut tobacco obtained by using the method of the present application can uniformly absorb the smoke generating agent and obtain cut tobacco with uniformly distributed smoke generating agent; after the produced heated cigarette is packed, sampling detection is performed, and the variation coefficient (CV) of the smoke generating agent content of the cut tobacco of each heated cigarette is as low as 1.50%, and therefore, the smoke generating agent is uniformly distributed in the cut tobacco of the heated cigarette, that is, the cut tobacco obtained by using the method of the present application can be used to produce a heated cigarette, and the uniformity of the smoke generating agent in the heated cigarette can be improved.

[0244] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A method for adding a smoking agent to cut tobacco, characterized in that: The following steps are involved: increasing the moisture content of natural tobacco leaves to a first preset concentration; Cutting natural tobacco leaves into shreds to obtain shredded tobacco; Reducing the moisture content of the tobacco to a second preset concentration; the second preset concentration is 10.0-13.0wt%; Raise the temperature of the tobacco to a preset temperature; the preset temperature is 80°C ± 6; The tobacco is subjected to a drum drying process; adding a smoke generating agent to the drum-dried cut tobacco; The weight ratio of the smoke agent to the tobacco is 15-20wt%; The step of increasing the moisture content of the natural tobacco leaves to a first preset concentration comprises: The tobacco leaves are subjected to vacuum conditioning treatment to increase the moisture content of the tobacco leaves to 16-18wt%; The tobacco leaves are loosened and moistened to increase the moisture content of the tobacco leaves to 17-19wt%; Adding water to the tobacco leaves to increase the moisture content of the tobacco leaves to 20-28wt%; The drum drying process of the tobacco comprises: The tobacco is subjected to a drum drying process to reduce the moisture content of the tobacco to 0-5wt%; Store the dried tobacco for 4-24 hours.

2. The method for adding a smoking agent to cut tobacco according to claim 1, characterized in that: The step of increasing the moisture content of the natural tobacco leaves to a first preset concentration comprises: The tobacco leaves are subjected to vacuum conditioning treatment: vacuum degree is 7-9°C, humidification temperature is 55-65°C, and heat preservation time is 90-180s, so that the moisture content of the tobacco leaves is increased to 16-18wt%; The tobacco leaves are loosened and moistened: the hot air temperature is 55-65℃, the mass ratio of water added to tobacco is 0-2%, and the moisture content of the tobacco leaves is increased to 17-19wt%; The tobacco leaves are treated with water: the liquid temperature is 50-60°C, the mass ratio of added water to tobacco is 5-26%, the rotation speed is 8-11 rpm, and the atomizing steam pressure is 0.3-0.6 bar, so that the moisture content of the tobacco leaves is increased to 20-28wt%.

3. The method for adding a smoking agent to cut tobacco according to claim 1, characterized in that: The natural tobacco leaves are cut into shreds to obtain shredded tobacco with a width of 0.7-1.1 mm.

4. The method for adding a smoking agent to cut tobacco according to claim 1, characterized in that: Reducing the moisture content of the tobacco to a second preset concentration includes: The tobacco is subjected to high-temperature airflow drying treatment: the steam temperature is 200-280°C, the anti-agglomeration steam is 0.1-1 bar, and the moisture content of the tobacco is reduced to a second preset concentration.

5. The method for adding a smoking agent to cut tobacco according to claim 1, characterized in that: Raising the temperature of the tobacco to a preset temperature comprises: The tobacco is subjected to a heating and moistening treatment: the steam flow rate is 68 kg / h, and the temperature of the tobacco is raised to 80℃±6.

6. The method for adding a smoking agent to cut tobacco according to claim 1, characterized in that: The storage environment for storing the dried tobacco is: The storage temperature of dried tobacco is 25-29℃; And / or, the humidity of the storage environment of the dried tobacco is 50-60%.

7. The method for adding a smoking agent to cut tobacco according to claim 1, characterized in that: During the drum drying process: The production negative pressure is -23-15mbar; and / or, the drum wall temperature is 130-150°C; and / or, the drum speed is 15-19 rpm; and / or, the hot air temperature is 130-150°C; and / or, the hot air velocity is 0.2-0.6 m / s; And / or, the tidal negative pressure is -21-15mbar.

8. The method for adding a smoking agent to cut tobacco according to claim 1, characterized in that: The step of adding a smoke generating agent to the drum-dried tobacco comprises: A plurality of smoke agent nozzles are arranged above the flavoring machine drum, and smoke agent is sprayed from each smoke agent nozzle so as to evenly add the smoke agent to the tobacco in the flavoring machine drum; Store the tobacco after adding the smoke agent for 3-48 hours.

9. The method for adding a smoking agent to cut tobacco according to claim 1, characterized in that: During the addition of the smoke agent: The smoke agent flow rate is 60-80kg / h; and / or, the temperature of the smoke agent is room temperature; And / or, the atomizing compressed air pressure is 1-4 bar.

10. The method for adding a smoking agent to cut tobacco according to claim 8, characterized in that: The storage environment for storing the tobacco after adding the smoking agent is: The storage temperature of tobacco after adding smoke agent is 26-32℃; And / or, the humidity of the storage environment of the tobacco after adding the smoke-generating agent is 50-60%.

11. The method for adding a smoking agent to cut tobacco according to claim 1, characterized in that: After the step of adding the smoke generating agent to the drum-dried tobacco, the process also includes boxing and storage; The storage environment of the boxed storage is: The ambient temperature for packaging and storage is 26-32℃; and / or, the humidity of the packaging and storage environment is 25-40%; And / or, the packaging storage time is 24-240h.

12. A heated cigarette, characterized in that: A smoke generating agent is added to the tobacco of the heated cigarette; The method for adding the smoking agent adopts the method for adding the smoking agent to the tobacco according to any one of claims 1 to 11.

Images