CN117007350A - Characterization method of processing intensity of burley tobacco baking machine - Google Patents
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- 241000208125 Nicotiana Species 0.000 title claims abstract description 123
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 123
- 238000012545 processing Methods 0.000 title claims abstract description 42
- 238000012512 characterization method Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims abstract description 58
- 238000001035 drying Methods 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 14
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 5
- 230000006870 function Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 claims description 2
- 235000019504 cigarettes Nutrition 0.000 abstract description 13
- 238000012546 transfer Methods 0.000 abstract description 6
- 238000005085 air analysis Methods 0.000 abstract 1
- 238000013139 quantization Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 25
- 230000001953 sensory effect Effects 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000007794 irritation Effects 0.000 description 2
- SNICXCGAKADSCV-JTQLQIEISA-N (-)-Nicotine Chemical compound CN1CCC[C@H]1C1=CC=CN=C1 SNICXCGAKADSCV-JTQLQIEISA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000002329 infrared spectrum Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229960002715 nicotine Drugs 0.000 description 1
- SNICXCGAKADSCV-UHFFFAOYSA-N nicotine Natural products CN1CCCC1C1=CC=CN=C1 SNICXCGAKADSCV-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
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- 230000003068 static effect Effects 0.000 description 1
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
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- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
- G01N5/025—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content for determining moisture content
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Abstract
The invention discloses a method for characterizing the processing intensity of a burley tobacco baking machine, which is based on two main objects of blade and hot air analysis of heat and mass transfer in the burley tobacco baking process, wherein low-boiling-point volatile components in the blade are transferred to the hot air along with the volatilization of moisture in the blade in the baking process, the volatilization amount of the low-boiling-point components in the blade is characterized by utilizing the volatilization amount of the moisture in the blade, meanwhile, the speed of the mass transfer of the moisture is controlled by utilizing the moisture saturation of the hot air, and the processing intensity of the burley tobacco baking machine is characterized in terms of the total amount and the speed of the mass transfer of the blade and the hot air in the burley tobacco baking process. The invention adopts a quantization method to represent the processing intensity in the baking process of the burley tobacco, and selects different leaf baking intensities according to the quality characteristics and consumption requirements of the mixed cigarette product, thereby effectively guiding the processing process of the mixed cigarette.
Description
Technical Field
The invention relates to the field of mixed cigarette processing, in particular to a method for representing processing intensity of a burley tobacco baking machine.
Background
In the tobacco industry, the mixed cigarettes are important products of machine-made cigarettes, a certain proportion of burley tobacco leaves are generally used in the mixed cigarettes, the content of nicotine in the burley tobacco leaves is high, the content of water-soluble sugar is extremely low, so that the sugar-alkali ratio is seriously unbalanced and uncoordinated, the smoke stiffness is large, the concentration is high, the aroma quantity is sufficient, and the impurity gas is heavier, therefore, a certain proportion of sugar materials are applied before a burley tobacco baking machine, the water-soluble sugar content in the leaves is improved, aroma is generated through Maillard reaction, part of impurity gas in the burley tobacco is removed by long-time high-temperature baking, and the chemical ingredient indexes of the baked burley tobacco leaves are coordinated.
The burley tobacco baking is a key procedure for processing the mixed cigarettes, and aims to reduce the water content of the leaves, improve the processing performance of the leaves and improve and promote the sensory quality of the leaves. The drying process is a key process in the cigarette processing process, at present, the generally adopted drying mode of the flue-cured tobacco type cigarettes in the tobacco industry comprises sheet drying, air flow drying and carbon dioxide expansion drying, the setting of the drying process parameters directly influences the physical quality and the sensory quality of the dried cut tobacco, and the influence on the aroma characteristic of the cigarettes and the sensory quality of the cut tobacco is more obvious than other cut tobacco making processes. The key parameters of the drying process are set, the temperature and the water content of the materials are changed in the surface in the drying process, and the physical quality, chemical components, aroma quality, miscellaneous gases, irritation and other sensory quality indexes of the tobacco are changed obviously. The burley tobacco baking is a drying process in the production process of the mixed cigarettes, has the characteristics of long drying time, large dehydration amount, static leaves, relatively small breakage and the like, and contains a large amount of water-soluble sugar in the feed liquid of the burley tobacco charging process before the burley tobacco baking, and has higher content of nitrogen-containing compounds such as amino acid, protein and the like in the burley tobacco leaves, and the water content of the burley tobacco charging process is more than 30 percent. Thus, burley tobacco baking has three important conditions for maillard reactions: temperature, moisture and time.
At present, a sheet drying method is commonly used in a tobacco industry drying procedure, key parameter combinations such as cylinder wall temperature, hot air flow velocity, tobacco shred residence time, tobacco shred filling coefficient in a roller and the like are used as tobacco shred processing intensity parameter characterization indexes, and influences of all process parameters on indexes such as tobacco shred sensory quality, aroma components, chemical components, tobacco shred physical quality and the like are analyzed.
The patent (publication No. CN 110286198A) entitled "method for evaluating consistency of cut tobacco processing intensity in roller drying process based on cut tobacco temperature rising process" dynamically detects surface temperature of cut tobacco in roller to obtain surface temperature distribution curve of cut tobacco in roller, and obtains a combined index by calculating in combination with indexes such as cut tobacco feeding temperature, discharging temperature and cut tobacco outlet water content to characterize batch cut tobacco processing intensity in sheet drying process. The method needs to dynamically detect the temperature distribution of the tobacco shred surface in the roller in the thin plate drying process, and the temperature probe is in instantaneous contact with the tobacco shred in the thin plate drying process and has thermal inertia, so that the accuracy of a temperature detection result is affected to a certain extent.
Patent (publication No. CN 103234936A) entitled "method for accurately characterizing material processing intensity in tobacco leaf shred drying procedure" adopts near infrared spectrum contrast analysis of tobacco leaf shreds before and after drying, adopts a main component-Marsh distance method, and utilizes inter-class average value of Marsh distance to characterize processing intensity in drying procedure. The method is complex to operate.
The tobacco industry technicians have also explored methods of characterizing the processing strength of the drying process using chemical composition changes before and after drying.
The research for characterizing the processing strength method in the drying process has positive significance for ascertaining the change rule in the drying process, but each existing method has limitations.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for representing the processing intensity of a burley tobacco roasting machine, so that the processing intensity of the burley tobacco roasting machine can be accurately quantized, the mixed cigarette processing technology is effectively guided, and the problem that the processing intensity of the burley tobacco roasting machine cannot be represented quantitatively can be solved.
The invention adopts the following technical scheme for realizing the purpose:
the invention relates to a method for characterizing the processing strength of a burley tobacco baking machine, which is characterized by comprising the following steps:
step 1, online collecting or offline detecting blade moisture W of blades before drying of burley tobacco baking machine 1 Moisture W of dried leaf 2 According to the material flow F before the blade enters the burley tobacco baking machine, calculating the dehydration quantity M of the blade in the burley tobacco baking process 1 ；
Step 2, adjusting the wind power balance of the burley tobacco baking machine, and arranging a horizontal section air inlet pipe at the side edge of the burley tobacco baking machineThe tunnel is provided with a measuring hole for hot air to enter, and is used as a detecting point of a hot air pressure difference value, and an air temperature sensor and a hot air pressure difference meter for hot air are arranged at the detecting point and are used for collecting a hot air temperature value T on line 1 And differential pressure value ΔP 1 ；
Step 3, a hot air moisture content sensor is arranged near the detection point and used for collecting the moisture content H of the hot air on line 1 Thereby according to the hot air temperature value T 1 And moisture content H 1 Calculating the density ρ of hot air 1 ：
Step 3.1, calculating the partial pressure p of water vapor in hot air according to the formula (1) q ：
In the formula (1): b is a standard atmospheric pressure value;
step 3.2, calculating the hot air density ρ according to the formula (2) 1 ；
Step 4, calculating the hot air velocity v according to the step 3 1 ；
Step 5, calculating the mass flow M of hot air according to the step 4 2 ；
In the formula (4), D represents the diameter of a hot air inlet pipeline;
step 6, arranging a moisture content sensor of the moisture removal gas on a moisture removal pipeline of a horizontal section positioned at the side of the burley tobacco baking machine, and acquiring the moisture content H of the moisture removal gas on line 2 ；
Step 7, entering hot air mass flow M according to the burley tobacco roasting machine 2 And moisture content H of moisture removing body 2 Calculating the water content M increased after the hot air passes through the burley tobacco roasting machine according to the formula (5) 3 ；
M 3 ＝M 2 ×(H 2 -H 1 ) (5)
Step 8, calculating the characterization index of the processing intensity of the burley tobacco roasting machine
The characterization method of the processing intensity of the burley tobacco roasting machine is also characterized in that the moisture content sensor in the step 3 is replaced by a relative humidity sensor of hot air, and the relative humidity RH of the hot air is collected online 1 Thereby according to the hot air temperature value T 1 Calculating the saturated steam partial pressure P of the hot air by using the formula (6) s1 ：
In the formula (6), EXP represents a natural exponential function;
calculating the partial pressure p of water vapor in hot air according to the formula (7) q1 ；
p q1 ＝p s1 ×RH 1 (7)
The moisture content sensor of the moisture-discharging gas in the step 6 is replaced by a relative humidity sensor of the moisture-discharging gas, and the relative humidity RH of the moisture-discharging gas is collected on line 2 An air temperature sensor is also arranged on a horizontal section moisture discharging pipeline positioned at the side of the burley tobacco baking machine and is used for collecting the temperature value T of the moisture discharging gas on line 2 Thereby according to the temperature value T of the moisture-removing gas 2 Calculating the saturated steam partial pressure P of the moisture removal gas by using the formula (6) s2 Based on the relative humidity RH of the exhaust gas 2 Calculating the partial pressure p of water vapor of the moisture-removing gas by using the formula (7) q2 Finally, the moisture content of the moisture removal gas is calculated according to the formula (1)H 2 。
In the step 1, the dehydration amount M is obtained by using the formula (8) 1 ：
In the step 2, the wind power balance of the burley tobacco baking machine is adjusted by adjusting the feeding end of the burley tobacco baking machine to negative pressure of 0 to minus 30 microppa and the discharging end to negative pressure of minus 5 to minus 30 microppa.
If the processing intensity representation index A is between 60% and 90%, the internal quality of the dried blade of the burley tobacco baking machine is better.
The processing intensity characterization index A is between 60 and 90 percent and is inversely proportional to the processing intensity of the burley tobacco roasting machine.
The invention provides an electronic device comprising a memory and a processor, characterized in that the memory is arranged to store a program for enabling the processor to execute the characterization method, the processor being arranged to execute the program stored in the memory.
The invention relates to a computer-readable storage medium, on which a computer program is stored, characterized in that the computer program is executed by a processor to perform the steps of the method of characterizing.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a method for characterizing the processing intensity of a burley tobacco roasting machine, which adopts a technical index to characterize the processing intensity of the burley tobacco in the roasting process, wherein the index is related to the dewatering amount and the hot air moisture content increasing value of the burley tobacco in the roasting process, and is characterized by utilizing the principle of conservation of mass and conservation of heat in the roasting process, from the chemical perspective of tobacco, according to the Dalton partial pressure law, and based on the principle of volatilization of aroma components and Maillard reaction in the burley tobacco in the roasting process, the mass transfer property analysis of two main objects in the burley tobacco in the roasting process is performed by utilizing the principle of conservation of mass in the burley tobacco in the roasting process: blade and hot air, bladeThe slices are the sources for mass transfer in the baking process of the burley tobacco, and the hot air is the carrier and the heat source for mass transfer in the baking process of the burley tobacco. Material dehydration amount M 1 The larger the hot air moisture content M 3 The smaller the processing intensity A value is, the higher the hot air saturation degree of the moisture carrier in the burley tobacco leaf is, the dehydration speed of the burley tobacco leaf in the baking process is reduced, the Maillard reaction degree in the burley tobacco baking process can be improved, meanwhile, the higher the steam partial pressure of volatile components in the leaf in hot air is, the volatilization speed of aroma components in the leaf in the burley tobacco drying process is reduced, and accordingly the aroma component loss in the leaf is reduced.
Detailed Description
The present invention will be described in further detail with reference to examples, but the examples are not intended to limit the technical scope of the present invention.
Unless otherwise indicated, all technical terms referred to refer to version 2016 of the cigarette Process Specification written by the State tobacco specialty agency.
In this embodiment, a method for characterizing processing intensity of a burley tobacco baking machine includes the following steps:
step 1, on-line collecting or off-line detecting the moisture W of the blade before and after the drying of the threshing and redrying baking machine 1 、W 2 According to the material flow F before the blade enters the threshing and redrying baking machine, calculating the dehydration amount M in the threshing and redrying baking process by using the formula (1) 1 ；
Step 2, adjusting the feeding end of the threshing and redrying baking machine to negative pressure of 0 to minus 30 micro Pa, adjusting the discharging end to negative pressure of minus 5 to minus 30 micro Pa so as to adjust the wind power balance of the threshing and redrying baking machine, arranging a measuring hole on a horizontal section air inlet pipeline which is positioned at the side edge of the threshing and redrying baking machine and enters by hot air supply, and taking the measuring hole as a hot air pressure difference value detecting point, and collecting a differential pressure value delta P of a differential pressure meter on line at the detecting point 1 On-line acquisition of temperature value T of air temperature sensor 1 ；
Step 3, collecting the moisture content H of hot air on line near the detection point 1 Thereby according to the temperature value T of the hot air 1 And moisture content H 1 Calculating the density ρ of hot air 1 ：
Step 3.1, calculating the partial pressure p of water vapor in hot air according to the formula (1) q ：
In the formula (1): b is a standard atmospheric pressure value;
step 3.2, calculating the hot air density ρ according to the formula (2) 1 ；
Step 4, calculating the hot air velocity v according to the step 3 1 ；
Step 5, calculating the mass flow M of hot air according to the step 4 2 ；
In the formula (4), D represents the diameter of a hot air inlet pipeline;
step 6, arranging a moisture content sensor of the moisture removal gas on a moisture removal pipeline of a horizontal section positioned at the side of the burley tobacco baking machine, and acquiring the moisture content H of the moisture removal gas on line 2 ；
Step 7, entering hot air mass flow M according to the burley tobacco roasting machine 2 And moisture content H of moisture removing body 2 Calculating the water content M increased after the hot air passes through the burley tobacco roasting machine according to the formula (5) 3 ；
M 3 ＝M 2 ×(H 2 -H 1 ) (5)
Step 8, calculating the characterization index of the processing intensity of the burley tobacco roasting machine
The processing intensity A value of the burley tobacco roasting machine is between 60% and 90%, the internal quality of the dried leaf of the burley tobacco roasting machine is better, and the roasting flavor in the leaf can be increased through Maillard reaction on the basis of basically keeping the organoleptic quality characteristics of the leaf raw material, and the flue gas irritation is reduced.
In specific implementation, the moisture content sensor in the step 3 is replaced by a relative humidity sensor of hot air, and the relative humidity RH of the hot air is collected online 1 Thereby according to the hot air temperature value T 1 Calculating the saturated steam partial pressure P of the hot air by using the formula (6) s1 ：
In the formula (6), EXP represents a natural exponential function;
calculating the partial pressure p of water vapor in hot air according to the formula (7) q1 ；
p q1 ＝p s1 ×RH 1 (7)
In this embodiment, the moisture content sensor of the exhaust gas in step 6 is replaced with a relative humidity sensor of the exhaust gas for online acquisition of the relative humidity RH of the exhaust gas 2 An air temperature sensor is also arranged on a horizontal section moisture discharging pipeline positioned at the side of the burley tobacco baking machine and is used for collecting the temperature value T of the moisture discharging gas on line 2 Thereby according to the temperature value T of the moisture-removing gas 2 Calculating the saturated steam partial pressure P of the moisture removal gas by using the formula (6) s2 Based on the relative humidity RH of the exhaust gas 2 Calculating the partial pressure p of water vapor of the moisture-removing gas by using the formula (7) q2 Finally, the moisture content H of the moisture removal gas is calculated according to the formula (1) 2 。
In this embodiment, an electronic device includes a memory for storing a program supporting the processor to execute the above method, and a processor configured to execute the program stored in the memory.
In this embodiment, a computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of the method described above.
Example 1
Step 1, the moisture content of the leaves of the Dubao A brand burley tobacco group entering a burley tobacco baking machine is 34.50%, the material flow before the leaves enter the burley tobacco baking machine is 2200kg/h, the moisture content of the discharged leaves after the burley tobacco baking is 8.55%, and the dehydration amount M in the burley tobacco baking process is calculated and obtained 1 625.1kg/h.
Step 2, adjusting the wind power balance of the burley tobacco roasting machine, adjusting the feeding end of the burley tobacco roasting machine to be slightly negative pressure of 0 to minus 30 microppa, adjusting the discharging end of the burley tobacco roasting machine to be negative pressure of minus 5 to minus 30 microppa, and arranging a measuring hole on a horizontal section air inlet pipeline which is positioned at the side edge of the burley tobacco roasting machine and is used as a hot air speed detecting point;
the pipe diameter D of the air inlet pipeline is measured to be 300mm; the pressure difference detection value delta P of the online pressure difference meter is 45Pa; the temperature t=120.2 ℃ at the hot air wind speed detection point is collected with a temperature sensor.
Step 3, collecting hot air baked by burley tobacco on line with relative humidity RH of 5.01%, which is as follows:
first, the air density ρ is calculated by the air relative humidity RH and the air temperature T according to the formula (2) 1 0.4850kg/m 3 ；
Step 4, detecting a pressure difference detection value delta P and an air density rho by an online pressure difference meter 1 Calculating according to formula (3) to obtain air velocity v 1 13.62m/s.
Step 5, calculating according to the formula (4) to obtain the hot air mass flow M 2 1681.2kg/h.
Step 6, calculating according to the formula (5) to obtain the moisture content M of the tidal volume 3 834.0kg/h;
and 7, calculating a characteristic index A of the processing intensity of the burley tobacco roasting machine to be 75.0%.
After the Dubao A brand burley tobacco group is baked by the combination of the process parameters, the material flow of the blade is small, the thickness of the burley tobacco blade on the distribution mesh belt of the burley tobacco baking machine is low, the blade is in full contact with hot air in the baking process, and the uniformity of the moisture content of the baked blade is improved.
From the comparison evaluation analysis of the sensory quality of burley tobacco before and after baking, the dried leaf blade is combined by adopting the technological parameters, the baking aroma is increased, the aroma texture is improved, the aroma quantity is increased, the burnt smell is slightly increased, the smoke concentration is reduced, the smoke roughness is reduced, and the internal sensory quality of the leaf blade is obviously improved after the burley tobacco is baked as a whole.
The above description is illustrative of the invention and is not intended to be limiting, but is to be construed as being included within the spirit and scope of the invention.
Claims (9)
1. The method for characterizing the processing intensity of the burley tobacco roasting machine is characterized by comprising the following steps of:
step 1, online collecting or offline detecting blade moisture W of blades before drying of burley tobacco baking machine 1 Moisture W of dried leaf 2 According to the material flow F before the blade enters the burley tobacco baking machine, calculating the dehydration quantity M of the blade in the burley tobacco baking process 1 ；
Step 2, adjusting the wind balance of the burley tobacco roasting machine, arranging a measuring hole for hot air to enter in on a horizontal section air inlet pipeline positioned at the side edge of the burley tobacco roasting machine, taking the measuring hole as a detection point of a hot air pressure difference value, arranging an air temperature sensor and a hot air pressure difference meter of hot air at the detection point, and acquiring a hot air temperature value T on line 1 And differential pressure value ΔP 1 ；
Step 3, a hot air moisture content sensor is arranged near the detection point and used for collecting the moisture content H of the hot air on line 1 Thereby according to the hot air temperature value T 1 And moisture content H 1 Calculating the density ρ of hot air 1 ：
Step 3.1, calculating the partial pressure p of water vapor in hot air according to the formula (1) q ：
In the formula (1): b is a standard atmospheric pressure value;
step 3.2, calculating the hot air density ρ according to the formula (2) 1 ；
Step 4, calculating the hot air velocity v according to the step 3 1 ；
Step 5, calculating the mass flow M of hot air according to the step 4 2 ；
In the formula (4), D represents the diameter of a hot air inlet pipeline;
step 6, arranging a moisture content sensor of the moisture removal gas on a moisture removal pipeline of a horizontal section positioned at the side of the burley tobacco baking machine, and acquiring the moisture content H of the moisture removal gas on line 2 ；
Step 7, entering hot air mass flow M according to the burley tobacco roasting machine 2 And moisture content H of moisture removing body 2 Calculating the water content M increased after the hot air passes through the burley tobacco roasting machine according to the formula (5) 3 ；
M 3 ＝M 2 ×(H 2 -H 1 ) (5)
Step 8, calculating the characterization index of the processing intensity of the burley tobacco roasting machine
2. The method for characterizing the processing intensity of a burley tobacco roasting machine according to claim 1, wherein the moisture content sensor in the step 3 is replaced by a hot air relative humidity sensor for on-line collection of the relative humidity RH of the hot air 1 Thereby according to the hot air temperature value T 1 Calculating the saturated steam partial pressure P of the hot air by using the formula (6) s1 ：
In the formula (6), EXP represents a natural exponential function;
calculating the partial pressure p of water vapor in hot air according to the formula (7) q1 ；
p q1 ＝p s1 ×RH 1 (7)。
3. The method for characterizing the processing intensity of a burley tobacco roasting machine according to claim 2, wherein the moisture content sensor of the exhaust gas of step 6 is replaced by a relative humidity sensor of the exhaust gas for on-line acquisition of the relative humidity RH of the exhaust gas 2 An air temperature sensor is also arranged on a horizontal section moisture discharging pipeline positioned at the side of the burley tobacco baking machine and is used for collecting the temperature value T of the moisture discharging gas on line 2 Thereby according to the temperature value T of the moisture-removing gas 2 Calculating the saturated steam partial pressure P of the moisture removal gas by using the formula (6) s2 Based on the relative humidity RH of the exhaust gas 2 Calculating the partial pressure p of water vapor of the moisture-removing gas by using the formula (7) q2 Finally, the moisture content H of the moisture removal gas is calculated according to the formula (1) 2 。
4. The method for characterizing burley tobacco roaster process strength as recited in claim 1, wherein: in the step 1, the dehydration amount M is obtained by using the formula (8) 1 ：
5. The method for characterizing burley tobacco roaster process strength as recited in claim 1, wherein: in the step 2, the wind power balance of the burley tobacco baking machine is adjusted by adjusting the feeding end of the burley tobacco baking machine to negative pressure of 0 to minus 30 microppa and the discharging end to negative pressure of minus 5 to minus 30 microppa.
6. The method for characterizing burley tobacco roaster process strength as recited in claim 1, wherein: if the processing intensity representation index A is between 60% and 90%, the internal quality of the dried blade of the burley tobacco baking machine is better.
7. The method for characterizing burley tobacco roaster process strength as recited in claim 1, wherein: the processing intensity characterization index A is between 60 and 90 percent and is inversely proportional to the processing intensity of the burley tobacco roasting machine.
8. An electronic device comprising a memory and a processor, wherein the memory is configured to store a program that supports the processor to perform the characterization method of any of claims 1-7, the processor being configured to execute the program stored in the memory.
9. A computer readable storage medium having a computer program stored thereon, characterized in that the computer program when executed by a processor performs the steps of the method of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310958925.6A CN117007350A (en) | 2023-08-01 | 2023-08-01 | Characterization method of processing intensity of burley tobacco baking machine |
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