CN112369647A - Tobacco stem shred preparation device and operation method thereof - Google Patents

Tobacco stem shred preparation device and operation method thereof Download PDF

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Publication number
CN112369647A
CN112369647A CN202011358418.1A CN202011358418A CN112369647A CN 112369647 A CN112369647 A CN 112369647A CN 202011358418 A CN202011358418 A CN 202011358418A CN 112369647 A CN112369647 A CN 112369647A
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China
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stems
tobacco
conveyor belt
heating
chamber
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CN112369647B (en
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何沛
刘春波
司晓喜
杨晨
向能军
唐石云
张凤梅
李振杰
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China Tobacco Yunnan Industrial Co Ltd
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China Tobacco Yunnan Industrial Co Ltd
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    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24BMANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B5/00Stripping tobacco; Treatment of stems or ribs
    • A24B5/16Other treatment of stems or ribs, e.g. bending, chopping, incising

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Abstract

The invention discloses a device for preparing cut stems for cigarettes, which takes strip-shaped tobacco stems as raw materials, prepares the cut stems for the cigarettes by the device, and sequentially comprises an elution assembly (1), an airflow drying assembly (2), a pressure reduction balancing assembly (3), a heating and conveying assembly (4) and a shredding assembly (5). The invention also specifically discloses an operation method of the device for preparing the cut stems for the cigarettes, and the cigarettes prepared from the cut stems treated by the device disclosed by the invention have the advantages that the ash whiteness can be generally improved by 15-30 units according to the detection of a standard method, the ash condensation index can be generally reduced by 1-2 units, the working time is short, the effect is good, the operation is simple and feasible, the universality is strong, the popularization is convenient, the crushing rate of raw materials can be controlled within 2-3%, and the production cost is greatly reduced.

Description

Tobacco stem shred preparation device and operation method thereof
Technical Field
The invention belongs to the field of novel tobacco smoking tools, and relates to a tobacco cut stem preparation device and an operation method thereof.
Background
In recent years, as the quality of cigarettes is improved by consumers, designers begin to optimize the cigarette details, and the whiteness of the cigarette ash is one of the cigarette ash. Generally speaking, the whiteness of cigarette ash can be roughly divided into two kinds, one is ash column whiteness, namely the whiteness of the outer surface of columnar ash presented after the cigarette is burnt; the other is the whiteness of the tobacco shred ash, namely the whiteness of the tobacco shred combustion ash presented after the internal tobacco shreds are peeled off from the cigarette paper ash after being combusted. The whiteness of ash column of the cigarette is mainly related to the combustion property of cigarette paper and the matching property of the cigarette paper and tobacco shreds; the whiteness of the tobacco ash is mainly determined by the formula structure and additives of the tobacco.
Although the incorporation of functional additives into tobacco shreds improves the whiteness of the tobacco ash, they are rarely used because they tend to present unpredictable safety hazards.
In addition, the stem shreds are compact in structure and easy to burst during combustion, the ash property of cigarette packages is affected, and the stem shreds cannot be directly used in tobacco shred formulas generally. Although the burst condition of the expanded cut stems can be greatly reduced, the content of nonflammable components such as pectin and the like contained in the expanded cut stems is still high, so that the burning ash of the expanded cut stems is generally blacker, the ash of cigarettes is blackened, and the consumption experience of consumers is influenced. However, in the prior art, the conventional formed cut stems (namely, expanded cut stems) are treated, although the process is simpler, a large amount of broken stems are caused in the processing process, the breakage rate in the normal elution process can reach about 10-20%, and the cost loss is large for industrial mass production.
The present invention has been made to solve the above problems.
Disclosure of Invention
The invention provides a cut stem preparation device, which is used for performing elution treatment on raw material tobacco stems (tobacco stems), repairing the tobacco stems, restoring the processing resistance strength of the tobacco stems, removing redundant repairing agents, and finally shredding.
The ash retention index in the present invention is a value obtained by multiplying the ratio of the area of the cracked portion of ash in the wrapper to the entire area by 100. If the ash crack portion area occupies 5.0% of the entire area, the ash index is 5.0. That is, the higher the ash index, the poorer the ash wrapping performance of the wrapper.
The invention provides a device for preparing cut stems for cigarettes, which takes strip-shaped tobacco stems as raw materials, prepares the cut stems for the cigarettes by the device, and sequentially comprises an elution component 1, an airflow drying component 2, a pressure reduction balancing component 3, a heating and conveying component 4 and a shredding component 5;
the stripping assembly 1 comprises a tobacco stem stripping chamber 17, the tobacco stem stripping chamber 17 is provided with a first feeding hole 13, a water outlet 14 and a first discharging hole 18, and the tobacco stem stripping chamber 17 is internally provided with a perforated conveying filter disc 11 capable of sliding up and down; a first heater 15 is arranged below the tobacco stem stripping chamber 17; for heating the eluate 16 in the stem stripping chamber 17.
The pneumatic drying assembly 2 comprises an air-permeable pneumatic drying conveyor 24 and a second heater 21 located therebelow; a blower 22 is arranged below the second heater 21; for air-drying the stems on the air-drying conveyor 24.
The pressure reducing and balancing assembly 3 comprises a pressure reducing and balancing chamber 36, the side wall of the pressure reducing and balancing chamber 36 is provided with a second feeding hole 32, a vent 33 and a pressure reducing port 34, and an instrument panel 35 for controlling pressure is connected to the pressure reducing port 34; the decompression balance chamber 36 is internally provided with a central rotating shaft 31, and the decompression balance chamber 36 is driven by the central rotating shaft 31 to rotate;
the heating and conveying assembly 4 comprises a heating and conveying belt 42 and a third heater 41 positioned below the heating and conveying belt; for heating the stems on the heated conveyor belt 42.
The shredding assembly 5 comprises a shredding chamber 53, and the side wall of the shredding chamber 53 is provided with a third feeding hole 51 and a second discharging hole 52.
Preferably, the device further comprises an outlet conveyor belt 6, wherein the outlet conveyor belt 6 is connected to the second outlet 52 and conveys the prepared cut stems.
Preferably, the tobacco stem stripping chamber 17 is also internally provided with a fixing buckle 12 which is positioned above the perforated conveying filter disc 11, and the perforated conveying filter disc 11 is fixed in the tobacco stem stripping chamber 17 through the fixing buckle 12 when sliding upwards to the position of the fixing buckle 12.
Preferably, the horizontal heights of the first discharging port 18, the pneumatic drying conveyor 24, the second feeding port 32, the heating conveyor 42 and the third feeding port 51 are in a relation that the first discharging port 18 is not less than the pneumatic drying conveyor 24, the second feeding port 32 is not less than the heating conveyor 42, and the third feeding port 51 is not less than the heating conveyor 42. So that the tobacco stems can smoothly enter the next procedure after finishing the procedures.
More preferably, the level of the first discharge port 18 is higher than that of the pneumatic drying conveyor 24, and the tobacco stems output from the first discharge port 18 fall onto the pneumatic drying conveyor 24 by natural gravity; the level of the airflow drying conveyor belt 24 is higher than that of the second feeding hole 32, and the tobacco stems on the airflow drying conveyor belt 24 fall into the pressure reduction balancing chamber 36 through the second feeding hole 32 by natural gravity; the horizontal height of the second feeding hole 32 is higher than that of the heating conveyor belt 42, in the rotating process of the pressure reduction balance chamber 36, the second feeding hole 32 is used as a tobacco stem input port and a tobacco stem output port, and the tobacco stems output by the second feeding hole 32 fall onto the heating conveyor belt 42 through natural gravity.
Preferably, the pneumatic drying conveyor 24 is made of a metal conveyor capable of ventilating.
The second aspect of the invention provides an operation method of the device for preparing the cut stems for the cigarettes, which is characterized in that the cut stems and the eluent are injected into the elution assembly 1, after one or more boiling treatments, the cut stems are subjected to airflow drying on the airflow drying conveyor belt 24 and conveyed into the pressure reduction balancing assembly 3, the repairing agent is added for pressure reduction repairing, the dried stems are poured on the heating conveyor belt 42 for spreading and heating, and after the excessive glycerin on the surfaces of the cut stems is fully volatilized and the flexibility meets the requirements of the shredding process, the cut stems are shredded, and the shredded tobacco stems are obtained, namely the cut stem products.
The method specifically comprises the following steps:
a. closing the water outlet 14, putting tobacco stems into the perforated conveying filter disc 11 in the tobacco stem stripping chamber 17, adding eluant 16 through the first feeding hole 13 until the tobacco stems can be completely immersed in the eluant 16, then starting the first heater 15, heating the eluant 16 to strip the tobacco stems, lifting the perforated conveying filter disc 11 to reach the level of the first discharging hole 18, stabilizing for 0.5-1min, enabling the eluant 16 in the tobacco stems to fall back to the bottom of the tobacco stem stripping chamber 17, opening the water outlet 14, and discharging the eluant 16;
b. after the tobacco stems are subjected to the stripping process, the conveying function of the conveying filter disc 11 with the holes is started, and the stripped tobacco stems are conveyed to the airflow drying conveyor belt 24 through the first discharge hole 18 for conveying; simultaneously turning on the second heater 21 and the blower 22 to perform pneumatic drying on the tobacco stems on the pneumatic drying conveyor 24;
c. after the tobacco stems are conveyed by the airflow drying conveyor 24 and fall into the pressure reduction balancing chamber 36 through the second feed inlet 32, a certain amount of repairing agent is added through the second feed inlet 32, the second feed inlet 32 and the ventilation opening 33 are closed, and after the pressure reduction balancing chamber 3610-30s is rotated along the central rotating shaft 31, the pressure reduction is started through the instrument panel 35 for controlling the pressure, and meanwhile, the whole pressure reduction balancing chamber 36 is continuously rotated to perform the pressure reduction and diffusion process;
d. after the balance is finished, opening the ventilation opening 33 to enable the external air to slowly enter the pressure reduction balance chamber 36, controlling the rotation when the internal and external air pressures are equal, enabling the second feeding hole 32 to be downward and to be opposite to the heating conveyor belt 42, and opening the second feeding hole 32 to enable the well-balanced tobacco stems to fall onto the heating conveyor belt 42; at the moment, the heating conveyor belt 42 slowly conveys at a constant speed, so that the tobacco stems can be uniformly and flatly laid on the surface of the conveyor belt;
e. after the tobacco stems are completely laid on the heating conveyor belt 42, the third heater 41 is turned on, the tobacco stems are subjected to heating treatment in an open environment, so that redundant repairing liquid on the surfaces of the tobacco stems is fully volatilized, the flexibility of the repairing liquid reaches the requirements of a shredding process, and the specific time depends on the amount of repairing dosage added in the early stage and different requirements of the shredding process and equipment;
f. after the heating is finished, the tobacco stems on the heating conveyor belt 42 are fed into the shredding chamber 53 through the third feeding port 51 for shredding, and tobacco stem shreds are prepared. The discharging conveyor belt 6 is connected to the second discharging hole 52, and conveys the prepared cut stems.
Wherein, step a can be repeated for a plurality of times. The above elution process is repeated after the water outlet 14 is closed again and the height of the perforated transfer filter tray 11 is lowered, as required by the actual production.
In a preferred embodiment of the second aspect of the present invention, in step a, the eluent 16 is water or an organic solvent, which refers to a washing solvent commonly used in the art, such as ethanol; eluting under boiling condition, if the eluent is water, eluting at 100 deg.C for 20-40 min.
The reason why the tobacco stems are eluted by heating the eluent to boiling is that the volume of stem strips (raw material tobacco stems) is large, and the boiling water is favorable for removing gas in pores inside the tobacco stems, so that soluble substances inside the tobacco stems are better eluted, and the repairing agent is also favorable for fully permeating during subsequent repairing.
In the preferred embodiment of the second aspect of the present invention, in step b, the conveying speed of the pneumatic drying conveyor 24, the temperature of the second heater 21 and the blowing rate of the blower 22 are adjusted to ensure that the moisture content of the tobacco stems is controlled within 40% when the tobacco stems fall into the reduced pressure balancing chamber 36. More preferably, the moisture content of the tobacco stems after the air flow drying is controlled to be in the range of 20-30%. The typical drying gas stream temperature is 100-120 ℃.
In a preferred embodiment of the second aspect of the invention, in step c, the remediation agent is a glycerol or propylene glycol remediation agent; the pressure is controlled between 400mbar and 800mbar, the balance time is between 60min and 120min, and the adding amount of the repairing agent is 20 percent to 30 percent of the mass of the stem. Because the eluted stem strips are obvious in shrinkage and strong in brittleness, and are easy to break when being directly cut into shreds, the stem strips need to be repaired in terms of processing strength to recover the flexibility of the stem strips.
Wherein, the addition amount of the repairing agent is too small, and the effect of full repairing cannot be achieved; too large can cause the cut stems to be too wet, the subsequent surface repairing agent removing time is prolonged, and the subsequent production is not facilitated.
Reducing pressure to balance the diffusion pressure, wherein when the pressure is too high, glycerol or propylene glycol molecules are not easy to fully diffuse; when the size is too small, atomization is easy to generate, and glycerol or propylene glycol molecules are not beneficial to the penetration of the inside of the cut stems.
The diffusion time is balanced by reducing the pressure, if the diffusion time is too short, the diffusion is insufficient, and the glycerol or the propylene glycol cannot permeate into the stem strips; if the length is too long, the balanced diffusion is basically finished, the effect is not large, and the waste of time and energy consumption is caused. The method has the advantages that pressure reduction balance diffusion is adopted in the repairing process, compared with tobacco shreds, the tobacco stems are hard, compact in structure and not beneficial to elution and repair (in addition, the repaired tobacco stems which are not shredded are not easy to elute and repair compared with the cut tobacco shreds), if the repairing agent is sprayed on the surfaces of the tobacco stems and then naturally diffuses, the repairing agent only can stay on the surfaces of the tobacco stems and cannot reach the insides of the tobacco stems, the flexibility of the tobacco stems is not obviously improved, so that the breakage cannot be effectively reduced, compared with the natural diffusion, the method is more beneficial to reducing the breakage rate and improving the whiteness of the ash of the cigarettes by adopting the pressure reduction balance diffusion.
In conclusion, the invention designs the pressure reducing balance component aiming at the repairing process pertinence and provides specific pressure reducing balance diffusion and pressure reducing balance diffusion time.
In a preferred embodiment of the second aspect of the present invention, in step e, the heating temperature of the third heater 41 is 60 to 80 ℃, and the heating time is 30 to 60 min.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with the common cut stems, the cigarette manufactured by the cut stems prepared by the device has the advantages that the ash whiteness can be generally improved by 15-30 units and the ash condensation index can be generally reduced by 1-2 units according to the standard method.
2. The invention adopts the pressure reduction balance component, can quickly diffuse and permeate the repairing agent on the surface of the cut stem in a short time, and the produced product is more uniform and has good stability.
3. The device integrates the elution, the drying and the restoration, is convenient for an operator to solve a plurality of steps in the processing process of the cut stems at one time, is simple and easy to implement, has strong universality and is convenient to popularize.
4. The method provided by the invention has the advantages that the raw material tobacco stems are directly treated and then cut into shreds, the crushing rate can be greatly reduced on the premise of improving the whiteness of the ash of the tobacco shreds, and the production cost is saved. Compared with the common process for improving the whiteness of the cigarette ash by processing the cut stems (the crushing rate is about 10-20%), the method can control the crushing rate to be 2-3%, and greatly reduces the production cost.
5. The invention provides a specific elution and repair method aiming at raw material tobacco stems, and compared with tobacco shreds, the tobacco stems are hard per se and compact in structure, and are not beneficial to elution and repair (besides, the repaired tobacco stems which are not shredded are not easy to elute and repair compared with the cut tobacco stems), especially in the repair process, after a repair agent is sprayed on the tobacco stems, the pressure of the pressure reduction balance diffusion is controlled to be 400-800 mbar, and when the pressure is too high, molecules of the repair agent are not easy to fully diffuse; and when the size is too small, atomization is easy to generate, and the infiltration of molecules of the repairing agent into the cut stems is not facilitated. The pressure reduction and equilibrium diffusion time is 60-120 min. If the time is too short, the diffusion is insufficient, and the repairing agent cannot permeate into the tobacco stems; if the length is too long, the balanced diffusion is basically finished, the effect is not large, and the waste of time and energy consumption is caused. Under the condition, the processing resistance of the tobacco stems can be obviously improved, the influence on chemical components in the tobacco stems can be avoided, and the fine adjustment for the difference of the chemical components is also avoided after the processing resistance of the tobacco stems is repaired. Compared with the natural diffusion after the single spraying, the method for repairing the tobacco stems has the advantages that the crushing rate of the process for improving the whiteness of the cigarette ash is lower, and the improvement of the whiteness of the cigarette ash is more obvious. The method is mainly characterized in that if the repairing agent is sprayed on the surface of the tobacco stems and then naturally diffuses, the repairing agent can only stay on the surface of the tobacco stems and cannot reach the inside of the tobacco stems, the flexibility of the tobacco stems is not obviously improved, so that the smashing cannot be effectively reduced, and the smashing in the subsequent shredding process is very obvious. Compared with natural diffusion, the adoption of pressure reduction and balanced diffusion is more beneficial to reducing the breakage rate and improving the whiteness of the ash of the cigarettes.
6. The moisture content of the tobacco stems before decompression and diffusion is within 40%, preferably, the moisture content of the tobacco stems after airflow drying is controlled within the range of 20-30%, the aim is that the moisture content is high, the drying after decompression and diffusion can prolong the time for reaching the shredding requirement, and the diffusion speed of glycerol during decompression and diffusion can be limited if the moisture content is too low, so that the permeation of the glycerol into the tobacco stems is not facilitated.
7. Because the boiling process is another puffing and loosening process of the stem strips, the invention is carried out in the boiling process when the elution treatment is carried out on the raw material tobacco stems, and the stem strips in the process do not need to be expanded, thereby avoiding the phenomena of cracking and the like and reducing the process flow.
Drawings
FIG. 1 is a schematic view of the cut rolled stems preparation apparatus according to the present invention;
the reference numerals in the figures have the following meanings:
1-elution component, 11-perforated conveying filter disc, 12-fixed buckle, 13-first feeding port, 14-water outlet, 15-first heater, 16-eluent, 17-elution chamber, 18-first discharging port, 2-airflow drying component, 21-heating component, 22-air blowing component, 23-hot airflow, 24-airflow drying conveyor belt, 3-decompression balancing component, 31-central rotating shaft, 32-second feeding port, 33-ventilation port, 34-decompression port, 35-instrument panel, 36-decompression balancing chamber, 4-heating conveying component, 41-heater, 42-heating conveyor belt, 5-shredding component, 51-third feeding port, 52-second discharging port, 53-shredding chamber, 6-discharge conveyor belt.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but it should not be construed that the scope of the present invention is limited to the following examples. Various alterations and modifications made by those skilled in the art and ordinary skill in the art without departing from the spirit of the method described above are intended to be included within the scope of the invention.
The whole device for preparing the cut rolled stems is shown in figure 1.
In addition, in the present example, the whiteness of the coiled ash was measured by a conventional powder whiteness measurement method, and the ash fusion index was calculated by the method described above.
Example 1
As shown in fig. 1, the preparation method of the cut stems for cigarettes specifically comprises the following steps:
a. closing the water outlet 14, putting tobacco stems on the perforated conveying filter disc 11 in the tobacco stem elution chamber 17, adding water through the first feed inlet 13 until the tobacco stems can be completely immersed in the liquid level of the eluent 16, then opening the first heater 15, heating the eluent 16 to elute the tobacco stems, lifting the perforated conveying filter disc 11 to reach the height of the fixed buckle 12, stabilizing for 0.5-1min, enabling the eluent 16 in the tobacco stems to fall back to the bottom of the tobacco stem elution chamber 17, opening the water outlet 14, and releasing the eluent 16;
the above elution process is repeated after the water outlet 14 is closed again and the height of the perforated transfer filter tray 11 is lowered, as required by the actual production.
b. After the tobacco stems are subjected to the stripping process, the conveying function of the conveying filter disc 11 with the holes is started, and the stripped tobacco stems are conveyed to the airflow drying conveyor belt 24 through the first discharge hole 18 for conveying; simultaneously turning on the second heater 21 and the blower 22 to perform pneumatic drying on the tobacco stems on the pneumatic drying conveyor 24;
the conveying speed of the pneumatic drying conveyor belt 24, the temperature of the second heater 21 and the blowing rate of the blower 22 are adjustable, so that the moisture content of the tobacco stems is controlled to be about 30% when the tobacco stems fall into the reduced pressure balancing chamber 36.
c. After a sufficient amount of tobacco stems are conveyed by the air flow drying conveyor 24 and fall into the pressure reduction balancing chamber 36 through the second feed opening 32, a certain amount of glycerol repairing agent is added through the second feed opening 32, the second feed opening 32 and the vent opening 33 are closed, and after the pressure reduction balancing chamber 3620s is rotated along the central rotating shaft 31, the pressure reduction is started through the instrument panel 35 for controlling the pressure, and meanwhile, the whole pressure reduction balancing chamber 36 is continuously rotated to perform the pressure reduction and diffusion process;
the pressure is controlled at 400mbar, the balance time is 60min, and the addition amount of glycerol is 20% of the mass of the stem.
d. After the balance is finished, opening the ventilation opening 33 to enable the external air to slowly enter the pressure reduction balance chamber 36, controlling the rotation when the internal and external air pressures are equal, enabling the second feeding hole 32 to be downward and to be opposite to the heating conveyor belt 42, and opening the second feeding hole 32 to enable the well-balanced tobacco stems to fall onto the heating conveyor belt 42; at the moment, the heating conveyor belt 42 slowly conveys at a constant speed, so that the tobacco stems can be uniformly and flatly laid on the surface of the conveyor belt;
e. after the tobacco stems are completely laid on the heating conveyor belt 42, the third heater 41 is turned on, the tobacco stems are subjected to heating treatment in an open environment, the heating temperature is 60 ℃, the heating time is 30min, redundant repair liquid on the surfaces of the tobacco stems is fully volatilized, and the flexibility of the repair liquid reaches the requirements of a shredding process;
after the heating is finished, the tobacco stems on the heating and conveying assembly 4 are fed into the shredding assembly 5 through the feeding hole 51 for shredding, the produced cut stems are continuously output onto the conveyor belt 6 through the discharging hole 52, and the obtained cut stems are cut stem products disclosed by the patent.
f. After the heating is finished, the tobacco stems on the heating conveyor belt 42 are fed into the shredding chamber 53 through the third feeding port 51 for shredding, and tobacco stem shreds are prepared. The discharging conveyor belt 6 is connected to the second discharging hole 52, and conveys the prepared cut stems.
Wherein step a is repeated twice.
The shredding rate of the cut stems obtained by the method is about 2.4 percent. The cut stems are prepared into cigarettes (No. 2) by mixing the cut stems with cut tobacco without stems according to the proportion in the original formula, and the results are compared with the results of the original cigarettes (No. 1):
sample numbering Whiteness of ash Index of ash coagulation
1# 96.2 6.1
2# 124.3 4.5
As can be seen from the table above, compared with the original cigarette sample, the whiteness and the ash condensation index of the cigarette ash produced by adopting the processed cut stems are obviously improved.
Comparative example 1
Comparative example implementation differs from example 1 only in that the reduced-pressure equilibrium diffusion in example 1 for 60min was replaced by natural diffusion for 60min and then removed.
The shredding rate of the cut stems obtained by the method is about 8 percent. The cut stems are prepared into cigarettes (No. 2) by mixing the cut stems with cut tobacco without stems according to the proportion in the original formula, and the results are compared with the results of the original cigarettes (No. 1):
sample numbering Whiteness of ash Index of ash coagulation
1# 96.2 6.1
2# 108.4 5.7
As can be seen from the above table, the improvement of the whiteness and the ash coagulation index of the cigarette ash produced by using the treated cut stems is not obvious compared with the original cigarette sample.
Compared with the comparative example 1 and the example 1, the cut stems prepared by the method of the invention have more remarkable improvement on the whiteness and the ash condensation index of cigarette ash, probably because the reduced pressure diffusion process can make the glycerol penetrate into the interior more remarkably, so that the distribution of the same amount of glycerol in the cut stems is more uniform, the conditions that the combustion is insufficient due to overhigh concentration of the glycerol at part of positions, the ash is black and the ash condensation index is not good are reduced, and in addition, the condition that the crushing is increased due to insufficient glycerol amount in the cut stems can be prevented by adopting reduced pressure balance diffusion according to the crushing rate of the two. Therefore, compared with natural diffusion, the adoption of reduced pressure balance diffusion is more beneficial to reducing the breakage rate and improving the whiteness of the ash of the cigarettes.

Claims (10)

1. The device for preparing the cut stems for the cigarettes is characterized in that strip-shaped tobacco stems are used as raw materials, the cut stems for the cigarettes are prepared by the device, and the device sequentially comprises an elution assembly (1), an airflow drying assembly (2), a pressure reduction balancing assembly (3), a heating and conveying assembly (4) and a shredding assembly (5);
the stripping assembly (1) comprises a tobacco stem stripping chamber (17), wherein the tobacco stem stripping chamber (17) is provided with a first feeding hole (13), a water outlet (14) and a first discharging hole (18), and a perforated conveying filter disc (11) capable of sliding up and down is arranged inside the tobacco stem stripping chamber (17); a first heater (15) is arranged below the tobacco stem stripping chamber (17);
the pneumatic drying assembly (2) comprises an air-permeable pneumatic drying conveyor belt (24) and a second heater (21) positioned below the air-permeable pneumatic drying conveyor belt; a blower (22) is arranged below the second heater (21);
the pressure reducing and balancing component (3) comprises a pressure reducing and balancing chamber (36), a second feeding hole (32), a vent (33) and a pressure reducing port (34) are formed in the side wall of the pressure reducing and balancing chamber (36), and an instrument panel (35) for controlling pressure is connected to the pressure reducing port (34); the decompression balance chamber (36) is internally provided with a central rotating shaft (31), and the decompression balance chamber (36) is driven by the central rotating shaft (31) to rotate;
the heating conveying assembly (4) comprises a heating conveying belt (42) and a third heater (41) positioned below the heating conveying belt; for heating the tobacco stems on the heating conveyor belt (42).
The shredding assembly (5) comprises a shredding chamber (53), and a third feeding hole (51) and a second discharging hole (52) are formed in the side wall of the shredding chamber (53).
2. The device for preparing cut rolled stems for cigarettes according to claim 1, characterized in that it further comprises an outfeed conveyor belt (6), said outfeed conveyor belt (6) being connected to said second outfeed opening (52) to convey the prepared cut rolled stems away.
3. The device for preparing cut stems for tobacco use according to claim 1, wherein the stem stripping chamber (17) is internally provided with a fixing buckle (12) which is positioned above the perforated transfer filter disc (11), and the perforated transfer filter disc (11) is fixed in the stem stripping chamber (17) through the fixing buckle (12) when sliding upwards to the position of the fixing buckle (12).
4. The tobacco cut stem preparation device according to claim 1, wherein the first discharge port (18), the pneumatic drying conveyor belt (24), the second discharge port (32), the heating conveyor belt (42) and the third feed port (51) have a level relationship of the first discharge port (18) being not less than the level of the pneumatic drying conveyor belt (24) not less than the level of the second discharge port (32) not less than the level of the heating conveyor belt (42) not less than the level of the third feed port (51).
5. The device for preparing cut stems for cigarettes according to claim 1, wherein the airflow drying conveyor belt (24) is made of a metal conveyor belt which can ventilate.
6. An operating method of a device for preparing cut stems for cigarettes according to claim 1, characterized in that it comprises the following steps:
a. closing the water outlet (14), adding an eluent (16) through the first feeding hole (13) after tobacco stems are placed on the conveying filter disc (11) with holes in the tobacco stem stripping chamber (17) until the liquid level of the eluent (16) can completely immerse the tobacco stems, then opening the first heater (15), heating the eluent (16) to strip the tobacco stems, lifting the conveying filter disc (11) with holes to reach the level of the first discharging hole (18), stabilizing for 0.5-1min, enabling the eluent (16) in the tobacco stems to fall back to the bottom of the tobacco stem stripping chamber (17), opening the water outlet (14) and discharging the eluent (16);
b. after the tobacco stems are subjected to the elution process, the conveying function of the conveying filter disc (11) with the holes is started, and the eluted tobacco stems are conveyed to the air flow drying conveyor belt (24) through the first discharge hole (18) for conveying; simultaneously turning on the second heater (21) and the blower (22) to perform pneumatic drying on the tobacco stems on the pneumatic drying conveyor belt (24);
c. conveying tobacco stems through the airflow drying conveyor belt (24), adding a certain amount of repairing agent through the second feeding hole (32) after the tobacco stems fall into the pressure reduction balancing chamber (36) through the second feeding hole (32), closing the second feeding hole (32) and the ventilation opening (33), and after rotating the pressure reduction balancing chamber (36) along the central rotating shaft (31) for 10-30s, starting pressure reduction through the instrument panel (35) for controlling pressure and continuing to rotate the whole pressure reduction balancing chamber (36) to perform a pressure reduction and diffusion process;
d. after the balance is finished, opening the ventilation opening (33) to enable external air to enter a pressure reduction balance chamber (36), controlling the rotation when the internal and external air pressures are equal, enabling the second feeding hole (32) to face downwards to the heating conveyor belt (42), and opening the second feeding hole (32) to enable the well-balanced tobacco stems to fall onto the heating conveyor belt (42);
e. after the tobacco stems are laid on the heating conveyor belt (42), the third heater (41) is turned on, and the tobacco stems are subjected to heating treatment in an open environment, so that redundant repair liquid on the surfaces of the tobacco stems is volatilized;
f. after the heating is finished, the tobacco stems on the heating conveyor belt (42) are fed into the shredding chamber (53) through the third feeding port (51) for shredding, and tobacco stem shreds are prepared.
Wherein, step a can be repeated for a plurality of times.
7. The operating method according to claim 6, characterized in that in step a, the eluent (16) is water or an organic solvent; the elution temperature is the boiling temperature of the eluent; the elution time is 20-40 min.
8. The operating method according to claim 6, wherein in step b, the conveying speed of the pneumatic drying conveyor (24), the temperature of the second heater (21) and the blowing rate of the blower (22) are adjusted to ensure that the moisture content of the tobacco stems is controlled within 40% when the tobacco stems fall into the decompression balancing chamber (36).
9. The method of claim 6, wherein in step c, the remediation agent is glycerol or propylene glycol; the pressure is controlled between 400mbar and 800mbar, the balance time is between 60min and 120min, and the adding amount of the repairing agent is 20 percent to 30 percent of the mass of the stem.
10. The operating method according to claim 6, wherein in step e, the third heater (41) is heated at a temperature of 60-80 ℃ for a time of 30-60 min.
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CN114453369B (en) * 2021-11-25 2023-10-31 上海天昊达化工包装有限公司 Steel drum cleaning and drying system

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