CN110286660B - Method for regulating and controlling processing strength of cut tobacco in drying process based on temperature rise process of cut tobacco - Google Patents
Method for regulating and controlling processing strength of cut tobacco in drying process based on temperature rise process of cut tobacco Download PDFInfo
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- 238000012545 processing Methods 0.000 title claims abstract description 108
- 241000208125 Nicotiana Species 0.000 title claims abstract description 84
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 84
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- 230000001276 controlling effect Effects 0.000 title claims abstract description 13
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
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- G05B19/41875—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by quality surveillance of production
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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Abstract
The invention discloses a method for regulating and controlling the processing strength of roller-dried cut tobacco based on a cut tobacco temperature rise process, which comprises the following steps: A. acquiring processing parameters of a drying process of the roller: the temperature of the cylinder wall in the first area, the temperature of the cylinder wall in the second area, the temperature of hot air and the process flow; B. substituting the parameters into a calculation formula to calculate the processing strength of the roller dried cut tobacco: C. and selecting an adjusting mode according to the absolute value range of the difference value between the cut tobacco processing intensity of the target roller or the target batch in the drying process and the cut tobacco processing intensity of the roller to be detected or the batch to be detected in the drying process. The quantitative relation between the processing strength of the roller-dried cut tobacco and the processing parameters is established, the processing parameters are quickly obtained, the calculation result is accurate, and the operability is strong. Meanwhile, the relational expression quantifies the influence of different parameters on the processing strength of the roller-dried cut tobacco and the direction, and has strong guiding significance for developing processing parameter maintenance and technical standard formulation and revision in the actual production process.
Description
Technical Field
The invention belongs to the technical field of drying, and particularly relates to a method for regulating and controlling cut tobacco processing strength in a drying process based on a cut tobacco heating process.
Background
The tobacco shred drying is a key process for cigarette shred manufacturing production, and aims to reduce the moisture content of the tobacco shreds, improve and improve the sensory quality of the tobacco shreds, the physical quality and the sensory quality of the dried tobacco shreds are directly influenced by the setting of drying process parameters, and the influence on the aroma characteristic and the sensory quality of the tobacco shreds is particularly obvious compared with other shred manufacturing processes. The key parameters of the drying process are set, the surface is the change of the temperature and the moisture content of the materials in the drying process, and essentially, the physical quality, the chemical composition and the aroma composition of the tobacco leaves and the sensory quality indexes of the aroma quality, the miscellaneous gas, the irritation and the like of the tobacco leaves are obviously changed. Under the background of multi-point production, cooperative production and ever-expanding brand or specification, the consistency of the processing strength of the cut tobacco in the drying procedure plays a role in ensuring the homogenization of products with the same brand and specification.
At present, a roller drying method is generally used in the drying process of the tobacco industry, the key parameter combination of the roller drying process is used as the cut tobacco processing strength of the roller drying process for analysis, the key parameters such as the temperature of the cylinder wall, the temperature of hot air, the opening degree of a moisture exhaust air door and the like are optimized by a test design method, and the aims of optimizing the cut tobacco processing strength of the roller drying process and stabilizing the product quality are achieved by combining the sensory quality evaluation result of the product. However, the practical situation is that the roller drying process lacks a quantitative tobacco shred processing strength expression method and a quantitative relation with each key parameter, the key parameter maintenance of the roller drying process is always carried out by a trial and error method and a test design method, and the adjustment direction and amplitude of each key parameter and the combination optimization of each key parameter are always bottleneck factors for restricting the maintenance effect of the process parameter of the roller drying process.
Therefore, how to set each processing parameter of the drum drying process to improve the consistency of the processing strength of the cut tobacco is an urgent problem to be solved in the field. The present invention has been made to solve the above problems.
Disclosure of Invention
The invention provides a method for regulating and controlling the processing strength of roller-dried cut tobacco based on a cut tobacco temperature rise process, which comprises the following steps:
A. acquiring processing parameters of a drying process of the roller: first zone cylinder wall temperature T1Temperature T DEG C of the cylinder wall in the second zone2DEG C, hot air temperature T3DEG C, process flow G and absolute dry material kg/h;
B. substituting the parameters into the following formula to calculate the processing strength Q of the dried tobacco shreds in the rollers：
Qs＝70.775-6.110*10-6G2+1.328*10-2T1 2-2.473*10-2T2 2
+1.633*10-3T3 2+6.786*10-3T1*T2-3.718*10-2T1*T3
+4.856*10-2T2*T3
C. With QsTRepresenting the cut tobacco processing intensity of the target drum or target batch in the drying process, with QsAIndicating the cut tobacco processing intensity, Q, of the drying process of the cylinder or batch to be testedsTAnd QsAIs calculated as described in step B.
D. Differential maintenance was performed according to the following method:
(I)|QsT-QsAwhen the I is less than or equal to 3, the processing strength of the cut tobacco in two batches or two roller drying processes has no obvious difference, and the method for adjusting the process flow is preferentially selected within the normal and stable adjusting range of the equipment;
(II)3＜|QsT-QsAwhen the I is less than or equal to 5, the processing strength of the cut tobacco in two batches or two roller drying processes is different, and the mode of adjusting the temperature of hot air is preferentially selected in the normal and stable adjusting range of the equipment.
(III)|QsT-QsAWhen the absolute value is more than 5, the processing strength of the cut tobacco in two batches or two roller drying processes is obviously different, and the mode of regulating the temperature of the cylinder wall in the first area or the temperature of the cylinder wall in the second area is preferentially selected within the normal and stable regulation range of the equipment;
the first zone and the second zone are formed by axially and equally dividing the novel roller drying equipment into two cylinder wall temperature control zones with temperature difference in the roller, and the range of the cylinder wall of the first zone is half of the cylinder wall from the inlet of the roller to the roller; the range of the cylinder wall of the second area is from one half of the cylinder wall roller to the outlet of the roller; and the drying equipment is traditional tube-plate type roller drying equipment, and T1 is equal to T2, and the temperatures of the cylinder walls are all the same.
The processing strength unit of the cut tobacco is kJ/kg, QsThe numerical value of the processing strength of the cut tobacco is shown.
Preferably, the drum drying process processing parameters are obtained from an online detection instrument, an instrument or an on-site industrial personal computer.
Preferably, the method for regulating the processing strength of the batch or roller to be measured comprises the following steps: setting the processing intensity close to the processing intensity of the cut tobacco in the drying process of the target roller or the target batch, substituting the processing intensity into the cut tobacco processing intensity calculation formula according to the set processing intensity, reversely calculating the process flow, the cylinder wall temperature or the hot air temperature, and adjusting corresponding parameters according to the reversely calculated result. Preferably, the method for regulating the processing strength of the batch or roller to be measured comprises the following steps: setting the processing intensity close to the processing intensity of the cut tobacco in the drying process of the target roller or the target batch, substituting the processing intensity into the cut tobacco processing intensity calculation formula according to the set processing intensity, reversely calculating the process flow, the cylinder wall temperature or the hot air temperature, and adjusting corresponding parameters according to the reversely calculated result. Further, the above steps may be cycled until
|QsT-QsA| ≦ 3, see FIG. 1.
Preferably, when | QsT-QsAWhen the | is less than or equal to 3, performing three-point method inspection sensory quality evaluation and processing strength consistency analysis on the cut tobacco produced before and after the processing parameters are regulated and controlled and the target sample, and if the results of the three-point method inspection sensory quality evaluation and the processing strength consistency analysis are identical or more identical, regulating and controlling the processing parameters no longer;
if the difference between the results of the sensory quality evaluation and the processing strength consistency analysis of the three-point method is larger, fine-tuning the process flow until the absolute value of Q is reachedST-QSAIf the | is less than or equal to 1, the processing parameters are not regulated any more. And D, wherein the fine adjustment refers to the adjustment range smaller than the adjustment range of the process flow in the step D.
Wherein, the results of the sensory quality evaluation and the processing strength consistency analysis of the three-point method inspection are consistent or more consistent, and the difference is not more than one grade.
The difference is large, namely the difference between the sensory quality evaluation of the three-point method and the processing strength consistency analysis result exceeds one grade.
Wherein, the three-point method is used for detecting the sensory quality evaluation and the processing strength consistency analysis result levels are as follows:
preferably, when | QsT-QsAWhen the value is more than 5, the processing strength of the cut tobacco in two batches or two roller drying processes is obviously different, and the mode of regulating the temperature of the cylinder wall of a zone is preferentially selected within the normal and stable regulation range of the equipment. This mode of regulation is responsive.
Preferably, the roller drying equipment is a KLD-2Z type roller cut-tobacco drier.
The method for verifying the reliability and the robustness of the method for regulating and controlling the processing strength of the cut tobacco in the drying process comprises the following steps:
the leaf shreds and the target sample produced before and after the processing parameters are regulated and controlled are subjected to sensory quality analysis and processing strength consistency analysis through a three-point method, the reliability and the robustness of the regulating and controlling method are verified, and the method is used as a means for verifying and referring to the differential regulating and controlling effect of different parameters.
The sensory quality analysis method for the three-point method inspection is according to the cigarette brand cooperation production quality guarantee specification part 4: evaluation and improvement (Standard No.: YC/T198.4-2012) were carried out to evaluate the sensory consistency.
The invention has the following beneficial effects:
1. the quantitative relation between the processing strength of the roller-dried cut tobacco and the processing parameters established by the method has the advantages of quick acquisition of the processing parameters, accurate calculation result and strong operability. Meanwhile, the relational expression quantifies the influence of different parameters on the processing strength of the roller-dried cut tobacco and the direction, and has strong guiding significance for developing processing parameter maintenance and technical standard formulation and revision in the actual production process.
2. When the consistency of the processing quality is maintained, a differentiated maintenance flow of the processing strength of the roller drying cut tobacco is established, and the preferential adjustment modes of different parameters are established. And based on the quantitative relation between the processing strength of the roller-dried cut tobacco and the processing parameters, the key processing parameter value of the prior adjustment is solved reversely, so that the processing strength of the roller-dried cut tobacco can be quickly and accurately regulated. The defect that each parameter cannot be quantitatively adjusted in the prior art is avoided.
3. The roller drying cut tobacco processing strength difference maintenance process established in the method can realize the stability and consistency of the processing quality of different production batches or different production points, can represent the difference of sensory quality evaluation results, and effectively avoids the instability of the sensory quality evaluation results.
Drawings
FIG. 1 is a flow chart of a method for regulating and controlling the processing strength of cut tobacco in a drying process based on a temperature rise process of the cut tobacco, and meanwhile, a sensory quality analysis method is used for verifying the consistency of the processing strength.
Detailed Description
The present invention will be further described with reference to the following embodiments. The roller equipment used in the embodiment of the invention is as follows: KLD-2Z 7700 thin lamina cut tobacco drying equipment (flow: 5000kg/h, HAUNI, Germany).
Example 1
In this case 1, the cut tobacco was produced using a model a module, and 9 batches corresponding to different processing conditions were measured under the same model and the same drum drying equipment, and the difference in cut tobacco processing strength and sensory quality corresponding to different processing conditions were analyzed. Recording key processing parameters of the roller drying process of the corresponding batch: the actual running conditions of the parameters such as process flow, cylinder wall temperature, hot air temperature and the like and the key parameters of 9 batches of roller drying are shown in the table 1.
TABLE 1 actual operating data of different manufacturers and different processing parameters of brand A
Remarking: the cut tobacco drying equipment in the cigarette manufacturing industry mainly adopts tube sheet type roller drying equipment, and along with the continuous upgrading and more complete functions of the drying equipment, a processing mode of barrel wall temperature zone control of the roller drying equipment appears in the cigarette manufacturing industry, namely, the original tube sheet type roller drying equipment is axially equally divided into two barrel wall temperature control zones with obvious temperature difference, namely, the barrel wall is a first-zone barrel wall from a roller inlet to a roller halve, and the barrel wall is a second-zone barrel wall from the halve to a roller outlet, the first-zone barrel wall temperature T1 and the second-zone barrel wall temperature T2 in the roller drying process are carried out, if the equipment to be analyzed is the traditional tube sheet type roller drying equipment, the barrel wall temperatures are consistent, namely, the method is adopted, namely, the first-zone barrel wall temperature T1 is equal to the second-zone barrel wall temperature T2, and both are barrel wall. The process flow G is the dry basis cut tobacco quantity in the cut tobacco drying procedure in unit time, kg absolute dry material/h; the hot air temperature is a key processing parameter of the workshop ambient air after being heated by heat exchange and entering the roller drying equipment, and mainly plays a role in convection heat transfer and mass transfer power increase. The same applies below.
Substituting the actual operation data of the processing parameters in the table 1 into the calculation formula of the processing intensity of the tobacco shreds dried by the roller of the invention to calculate the processing intensity Q of the tobacco shreds dried by the roller of each batchsDrum drying cut tobacco processing strength QsAnalysis ofThe results are shown in Table 2.
The calculation formula of the processing strength of the roller-dried cut tobacco is as follows:
Qs＝70.775-6.110*10-6G2+1.328*10-2T1 2-2.473*10-2T2 2
+1.633*10-3T3 2+6.786*10-3T1*T2-3.718*10-2T1*T3
+4.856*10-2T2*T3
TABLE 2 analysis of the consistency of the processing strengths under the same brand and different processing conditions
The number of the smokers is 11, and the number of the smokers is according to the No. 4 part of the cigarette brand cooperative production quality guarantee standard: evaluation and improvement (standard No. YC/T198.4-2012) for sensory consistency evaluation, taking sample 1 as target sample, selecting roller-dried batch 3, 6 and 9 for sensory quality evaluation, and the conditions are shown in Table 3.
TABLE 3 sensory evaluation of samples by three-point test
Remarking: three-point test notation I: no difference exists; II, basically no difference; there are differences in III and significant differences in IV.
According to the specification, the processing strength of the 1 st roller-dried cut tobacco is taken as a target batch, the processing strength of the 3 rd and 1 st roller-dried cut tobacco has no obvious difference, and the processing strength of the 6 th, 9 th and 1 st roller-dried cut tobacco has obvious difference; the results of sensory quality evaluation by three-point inspection are consistent with the results of consistency analysis of the processing strength of the dried tobacco shreds by the roller.
Example 2
In this example 2, the same experimental data as in example 1 were selected to illustrate the process of controlling the consistency of the processing strength of the roller-dried cut tobacco.
Selecting the data of the 6 th batch and the 9 th batch in the table 1, and taking the 1 st batch as the target roller drying cut tobacco processing strength QsAWith QsTIndicating the processing strength of the 6 th and 9 th roller drying cut tobacco to be adjusted.
The regulation and control method comprises the following steps:
according to the method for regulating and controlling the processing intensity of the dried cut tobacco in the roller, the absolute value of the difference value | Q between the processing intensities of the 1 st batch, the 6 th batch and the 9 th batchsT-QsAI > 5, so the method of adjusting the cylinder wall temperature T1 or T2 is preferably adopted, and the embodiment selects to adjust T1. Keeping other processing parameters unchanged, and drying cut tobacco by a roller to obtain the processing strength QsAThe value is 45.60, and the processing strength Q is based on the roller drying of the cut tobaccosAnd (3) calculating a formula, reversely solving the first-zone cylinder wall temperature T1 in the relation of the processing strength of the dried tobacco leaves by the roller, and solving the corrected value of the first-zone cylinder wall temperature T1 of the 6 th batch and the 9 th batch to be about 166.00 ℃, which is shown in Table 4.
TABLE 4 inverse solution results and analysis of the barrel wall temperature
And (4) reversely solving the result according to the wall temperature T1 of the first area in the table 4 to perform lofting, and checking the consistency of the sensory quality by adopting a three-point method.
The number of the smokers is 15, and the number of the smokers is according to the No. 4 part of the cigarette brand cooperative production quality guarantee standard: evaluation and improvement (Standard No.: YC/T198.4-2012) were evaluated for sensory consistency, and the sensory evaluation of the samples of the corresponding lots 6 and 9 after correction were checked at three points as shown in Table 5.
TABLE 5 sensory evaluation of samples by three-point test
Remarking: three-point test notation I: no difference exists; II, basically no difference; there are differences in III and significant differences in IV.
Table 4 shows that there is no significant difference in the processing strength of the modified 6 th and 9 th drum-dried cut tobacco of the target batch and the 1 st drum-dried cut tobacco of the target batch, and there is no substantial difference in the sensory quality of the modified 6 th and 9 th drum-dried cut tobacco of the target batch and the 1 st drum-dried cut tobacco of the target batch according to the corresponding sensory quality evaluation result table 5.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. A method for regulating and controlling the processing strength of roller-dried cut tobacco based on a cut tobacco temperature rise process is characterized by comprising the following steps:
A. acquiring processing parameters of a drying process of the roller: first zone cylinder wall temperature T1Temperature T DEG C of the cylinder wall in the second zone2DEG C, hot air temperature T3DEG C, process flow G and absolute dry material kg/h;
B. substituting the parameters into the following formula to calculate the processing strength Q of the dried tobacco shreds in the rollers：
Qs＝70.775-6.110*10-6G2+1.328*10-2T1 2-2.473*10-2T2 2+1.633*10-3T3 2+6.786*10-3T1*T2-3.718*10-2T1*T3+4.856*10-2T2*T3
C. With QsTRepresenting the cut tobacco processing intensity of the target drum or target batch in the drying process, with QsAIndicating the cut tobacco processing intensity, Q, of the drying process of the cylinder or batch to be testedsTAnd QsAIs calculated as in step BThe above-mentioned;
D. calculating QsTAnd QsAAbsolute value of difference, according to QsTAnd QsAAnd performing differential maintenance on the absolute value of the difference value:
(I)|QsT-QsAwhen the I is less than or equal to 3, the processing strength of the cut tobacco in two batches or two roller drying processes has no obvious difference, and the method for adjusting the process flow is preferentially selected within the normal and stable adjusting range of the equipment;
(II)3＜|QsT-QsAwhen the I is less than or equal to 5, the processing strength of the cut tobacco in two batches or two roller drying processes is different, and the mode of adjusting the temperature of hot air is preferentially selected within the normal and stable adjusting range of the equipment;
(III)|QsT-QsAwhen the absolute value is more than 5, the processing strength of the cut tobacco in two batches or two roller drying processes is obviously different, and the mode of regulating the temperature of the cylinder wall in the first area or the temperature of the cylinder wall in the second area is preferentially selected within the normal and stable regulation range of the equipment;
the first zone and the second zone are formed by axially and equally dividing the novel roller drying equipment into two cylinder wall temperature control zones with temperature difference in the roller, and the range of the cylinder wall of the first zone is half of the cylinder wall from the inlet of the roller to the roller; the range of the cylinder wall of the second area is from one half of the cylinder wall roller to the outlet of the roller; and the drying equipment is traditional tube-plate type roller drying equipment, and T1 is equal to T2, and the temperatures of the cylinder walls are all the same.
2. The method of claim 1, wherein the drum drying process processing parameters are obtained from an on-line inspection instrument, meter, or an on-site industrial personal computer.
3. The method of claim 1, wherein | Q issT-QsAWhen the value is more than 5, the processing strength of the cut tobacco in two batches or two roller drying processes is obviously different, and the mode of regulating the temperature of the cylinder wall of a zone is preferentially selected within the normal and stable regulation range of the equipment.
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| CN111443680B (en) * | 2020-04-24 | 2021-03-05 | 龙岩烟草工业有限责任公司 | Control method, control device and cigarette processing equipment |
| CN111728252B (en) * | 2020-07-06 | 2022-04-19 | 河南中烟工业有限责任公司 | Control method and system for drying strength of tobacco roller |
| CN111728253B (en) * | 2020-07-06 | 2022-06-21 | 河南中烟工业有限责任公司 | Control method and system for tobacco airflow drying strength |
| CN112641124B (en) * | 2020-12-25 | 2022-10-25 | 河南中烟工业有限责任公司 | Method and system for controlling consistency of processing strength of tobacco roller type warming equipment |
| CN112471572B (en) * | 2020-12-25 | 2022-05-24 | 河南中烟工业有限责任公司 | Method and system for controlling consistency of processing strength of tobacco tunnel type temperature increasing equipment |
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