CN109967357B - Method and system for controlling opening degree of air door of cut tobacco winnowing machine - Google Patents
Method and system for controlling opening degree of air door of cut tobacco winnowing machine Download PDFInfo
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- CN109967357B CN109967357B CN201910236623.1A CN201910236623A CN109967357B CN 109967357 B CN109967357 B CN 109967357B CN 201910236623 A CN201910236623 A CN 201910236623A CN 109967357 B CN109967357 B CN 109967357B
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- 241000208125 Nicotiana Species 0.000 title claims abstract description 249
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 249
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000000926 separation method Methods 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims description 71
- 239000000463 material Substances 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims 1
- 238000011065 in-situ storage Methods 0.000 abstract description 2
- 235000019504 cigarettes Nutrition 0.000 description 8
- 238000013461 design Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 241000748095 Hymenopappus filifolius Species 0.000 description 4
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- 239000002699 waste material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000013072 incoming material Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 239000012535 impurity Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- A24B5/00—Stripping tobacco; Treatment of stems or ribs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/04—Control arrangements
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Abstract
The invention discloses a method and a system for controlling the opening degree of an air door of a cut tobacco winnowing machine. The method for controlling the opening degree of the air door of the cut tobacco winnowing machine comprises the following steps: acquiring a measured stem flow value at an outlet of the winnowing machine; acquiring the moisture content of the stems at the outlet of the winnowing machine; carrying out moisture content standardization conversion on the measured stem flow value at the outlet of the winnowing machine to obtain a stem flow value with standardized moisture content; calculating the difference value between the stem flow value with the standardized water content and a preset stem flow value; and adjusting the opening degree of an air door of the cut tobacco winnowing machine according to the difference value. The method can quickly achieve the accurate control of the stem-picking rate of the in-situ air separation outlet and the silk content in the picked stems, realize automatic control, reduce human intervention and further improve the purity of finished cut tobacco.
Description
Technical Field
The invention relates to the field of tobacco processing, in particular to a method and a system for controlling the opening degree of an air door of a cut tobacco winnowing machine.
Background
The cut tobacco two-stage winnowing equipment is widely applied to cigarette production enterprises and is used for removing stems in cut tobacco leaves. Which consists of a primary cut tobacco winnowing mechanism and a secondary cut tobacco winnowing mechanism. In the tobacco shred manufacturing process, the tobacco shreds are subjected to primary selection through a primary tobacco shred air separation mechanism, the stems falling from the primary air separation and a small part of the tobacco shreds are quantified and then enter a secondary tobacco shred air separation mechanism for secondary selection, so that the stems are selected and screened, and the aim of improving the purity of the tobacco shreds is fulfilled. In the winnowing process, the screening efficiency of winnowing can be adjusted by controlling the opening degree of an air door of the cut tobacco winnowing mechanism. At present, each cigarette production enterprise uses a fixed primary air separation throttle opening and a secondary air separation throttle opening in the cigarette shred production process of cigarettes of the same brand.
Disclosure of Invention
The inventor finds that when the cigarette is cut into shreds for production, the moisture content of tobacco at the outlet of the cut-tobacco drier is different, the moisture content difference can reach 0.2% -1.2%, and the difference of the moisture content causes the difference of the flow of materials entering the cut-tobacco winnowing equipment. When the opening degree of an air door of the cut tobacco winnowing mechanism is fixed, if the flow of incoming materials is changed, the primary winnowing blanking flow is unstable. The primary air separation blanking flow fluctuates, so that the fluctuation of the secondary air separation incoming material flow is influenced, the rejected stem sticks and the like cannot be effectively rejected, and the rejection burden of a cigarette making machine is increased; or the number of available cut tobacco in the rejected material is increased, and the material waste is increased.
The inventors have also found that the rejection stability cannot be controlled well merely by weighing the flow value of the rejected stems at the exit of the cut tobacco winnowing machine and adjusting the air door opening of the cut tobacco winnowing machine based thereon. The reason is mainly that the moisture content of the stems can change in the winnowing process, and the actual measured value of the stem flow obtained by directly detecting the outlet of the cut tobacco winnowing machine cannot accurately reflect the actually-removed stem flow.
Aiming at the defects in the prior art, the invention provides a method and a system for controlling the opening degree of an air door of a cut tobacco winnowing machine, the method can quickly achieve the accurate control of the removal rate of stems at an outlet of an in-situ winnowing and the removal of cut tobacco content in the stems, realize automatic control, reduce human intervention and further improve the purity of finished cut tobacco.
In some aspects, there is provided a method of controlling a damper opening of a leaf thread air separator, comprising:
acquiring a measured stem flow value at an outlet of the winnowing machine;
acquiring the moisture content of the stems at the outlet of the winnowing machine;
carrying out moisture content standardization conversion on the measured stem flow value at the outlet of the winnowing machine to obtain a stem flow value with standardized moisture content;
calculating the difference value between the stem flow value with the standardized water content and a preset stem flow value;
and adjusting the opening degree of an air door of the cut tobacco winnowing machine according to the difference value.
The inventor finds that after the moisture content standardized conversion is carried out on the measured stem sliver flow value at the outlet of the winnowing machine, the stem sliver rejection amount of the cut tobacco winnowing machine can be more accurately reflected by the obtained stem sliver flow value with the standardized moisture content, and then the air door opening degree of the cut tobacco winnowing machine can be more accurately adjusted, so that all winnowing indexes conform to the design range. (see example 1)
In some embodiments, the normalized stem flow value (S) for moisture content is obtained by converting the following equation:
wherein,
S1the measured stem flow value (kg/h) at the outlet of the winnowing machine is obtained;
m is the moisture content of the stems at the outlet of the air separator;
and C is the preset standardized water content.
In some embodiments, M ═ M1+(M'-M1')，M1The moisture content value (%) of the cut tobacco to be fed into the air separator, M' is the mean value of the moisture contents of the stems at the outlet of the air separator in batches, and M is the moisture content value (%) of the cut tobacco at the outlet of the air separator in batches1' is the average value of the moisture content of a plurality of batches of leaf shreds to be fed into the winnowing machine.
In some embodiments, the above method further comprises obtaining a moisture content value (%) as the cut tobacco to be fed into the air classifier.
In some embodiments, the method further comprises obtaining an average of moisture content of the stalks at the outlet of the plurality of batches of air classifiers.
In some embodiments, the method further comprises obtaining an average of moisture content of a plurality of batches of the leaf filaments to be fed into the air classifier.
In some embodiments, C is 0.1 to 0.2, for example C is 0.12.
In some embodiments, the method comprises detecting the stem flow at the exit of the cut tobacco winnowing machine in real time using an electronic scale to obtain an actual measurement of the stem flow at the exit of the winnowing machine.
In some embodiments, the method comprises detecting a moisture value (%) of the cut tobacco to be fed into the air classifier using a moisture detector.
In some embodiments, the standardized conversion of the moisture content of the measured stem sliver flow value at the air classifier outlet means that the measured flow value of the stem sliver at the air classifier outlet (possibly stem sliver with non-standard moisture content) is converted into the flow value of the same dry weight (stem sliver with standard moisture content).
In some embodiments, adjusting the current damper opening of the cut tobacco winnowing machine based on the difference comprises
If the difference value is within the preset interval range, adjusting the current air door opening of the cut tobacco winnowing machine to be equal to the preset opening;
if the difference value is larger than the upper limit value of the preset interval, adjusting the current air door opening of the cut tobacco winnowing machine to be smaller than the preset opening;
and if the difference value is smaller than the lower limit value of the preset interval, adjusting the current air door opening of the cut tobacco winnowing machine to be larger than the preset opening.
In some embodiments, adjusting the current damper opening of the cut tobacco winnowing machine based on the difference comprises
If the difference value is within the preset interval range and lasts for 5-30 s, adjusting the current air door opening of the cut tobacco winnowing machine to be equal to the preset opening;
if the difference value is larger than the upper limit value of the preset interval and lasts for 5-30 s, adjusting the current air door opening of the cut tobacco winnowing machine to be smaller than the preset opening;
and if the difference value is smaller than the lower limit value of the preset interval and lasts for 5-30 s, adjusting the current air door opening of the cut tobacco winnowing machine to be larger than the preset opening.
In some embodiments, adjusting the current damper opening of the cut tobacco winnowing machine based on the difference comprises the following operations;
if the difference value between the stem flow value with the standardized water content and the preset stem flow value is a kg/h, adjusting the current air door opening degree of the cut tobacco winnowing machine to enable the difference value between the current air door opening degree of the cut tobacco winnowing machine and the preset air door opening degree of the cut tobacco winnowing machine to be e%; wherein,
when a is within (-1.5,1.5), the value of e is 0;
when a is in the range of [1.5,5], the value range of e is [1,3 ];
when a is in the range of (5, 10), the value range of e is [2,4 ];
when a is in the range of [ -5, -1.5], the value range of e is [ -3, -1 ];
when a is in the range of [ -10, -5 ], the value of e is in the range of [ -4, -2 ];
-10≤a≤10，-4≤e≤4。
in some embodiments, the cut tobacco winnowing machine receives cut tobacco output from the cut tobacco dryer, and the cut tobacco to be input into the winnowing machine is the cut tobacco output from the cut tobacco dryer; the water content of the cut tobacco entering the winnowing machine is the water content of the cut tobacco at the outlet of the cut tobacco drying machine.
In some embodiments, the cut leaf winnowing machine is a multi-stage cut leaf winnowing machine comprising a first cut leaf winnowing mechanism and a second cut leaf winnowing mechanism:
the first cut tobacco winnowing mechanism separates the stem primary material from cut tobacco;
separating the stem slivers from the primary stem slivers by the second leaf-shred winnowing mechanism;
adjusting the current air door opening of the cut tobacco winnowing machine comprises adjusting the current air door opening of a first cut tobacco winnowing mechanism and a second cut tobacco winnowing mechanism of the cut tobacco winnowing machine, and the step comprises the following steps:
if the difference value is within the preset interval range, adjusting the current air door opening degree of the first cut tobacco winnowing mechanism to be equal to a first preset opening degree; adjusting the opening degree of an air door of the second tobacco shred winnowing mechanism to be equal to a second preset opening degree;
if the difference value is larger than the upper limit value of the preset interval, adjusting the current air door opening of the first cut tobacco winnowing mechanism to be smaller than a first preset opening, and adjusting the air door opening of the second cut tobacco winnowing mechanism to be smaller than a second preset opening;
if the difference value is smaller than the lower limit value of the preset interval, adjusting the current air door opening of the first cut tobacco winnowing mechanism to be larger than a first preset opening, and adjusting the air door opening of the second cut tobacco winnowing mechanism to be larger than a second preset opening.
In some embodiments, adjusting the current damper opening of the first and second leaf filament winnowing mechanisms of the leaf filament winnowing machine comprises:
if the difference value between the stem flow value with the standardized water content and the preset stem flow value is a kg/h, adjusting the current air door opening degree of the first cut tobacco winnowing mechanism and the air door opening degree of the second cut tobacco winnowing mechanism to enable the difference value between the current air door opening degree of the first cut tobacco winnowing mechanism and the preset air door opening degree of the first cut tobacco winnowing mechanism to be e1Percent, the difference value of the current air door opening degree of the second leaf thread air separation mechanism and the preset air door opening degree of the second leaf thread air separation mechanism is e2Percent; wherein
If a is in the range (-1.5,1.5), e1、e2Are respectively 0;
when a is in [1.5,5]]In the range of e1Has a value range of [1,3]]，e2Has a value range of [0, 2]]；
When a is in (5, 10)]In the range of e1Has a value range of [2,4]]，e2Has a value range of [1,3]]；
When a is [ -5, -1.5 [)]In the range of e1Has a value range of [ -3, -1 [)]，e2Has a value range of [ -2, 0]]；
When a is in the range of [ -10, -5 ], e1Has a value range of [ -4, -2 [)]，e2Has a value range of [ -3, -1 [)]；
-10≤a≤10，-4≤e1≤4，-4≤e2≤4。
In some embodiments, the stem flow rate is preset at (45 ± 1.5) kg/h, for example 45 kg/h.
In some aspects, a system for controlling the opening of a damper of a leaf thread air separator is provided, comprising
The stem flow value acquisition module is used for acquiring a stem flow value at the outlet of the current winnowing machine;
the stem moisture content acquisition module is used for acquiring the moisture content of the stems at the outlet of the winnowing machine;
the calculation module is used for calculating the difference value of the stem flow value at the outlet of the current winnowing machine and the stem flow value at the outlet of a preset winnowing machine of the cut tobacco winnowing machine;
and the air door opening adjusting module is used for adjusting the current air door opening of the cut tobacco winnowing machine according to the difference value.
In some embodiments, the damper opening adjustment module adjusts the current damper opening of the cut tobacco winnowing machine according to the following rules:
if the difference value is within the preset interval range, adjusting the current air door opening of the cut tobacco winnowing machine to be equal to the preset opening;
if the difference value is larger than the upper limit value of the preset interval, adjusting the current air door opening of the cut tobacco winnowing machine to be smaller than the preset opening;
and if the difference value is smaller than the lower limit value of the preset interval, adjusting the current air door opening of the cut tobacco winnowing machine to be larger than the preset opening.
In some embodiments, the system is used to perform operations that implement a method of controlling a damper opening of a leaf thread air classifier.
In some aspects, there is provided an apparatus for controlling the opening of a damper of a leaf thread air separator, comprising:
a memory to store instructions;
and the processor is used for executing the instruction, so that the device for controlling the opening degree of the air door of the cut tobacco winnowing machine executes the operation for controlling the opening degree of the air door of the cut tobacco winnowing machine.
In some aspects, a cut tobacco processing apparatus is provided, including, for example, a system for controlling the opening of a cut tobacco winnower air door, or a device for controlling the opening of a cut tobacco winnower air door.
In some embodiments, the cut tobacco processing apparatus further comprises
The system for controlling the opening degree of the air door of the cut tobacco winnowing machine or the device for controlling the opening degree of the air door of the cut tobacco winnowing machine is in communication connection with the cut tobacco drier, and a stem flow value and a stem moisture content at the outlet of the cut tobacco winnowing machine are collected;
the system for controlling the opening degree of the air door of the cut tobacco winnowing machine or the device for controlling the opening degree of the air door of the cut tobacco winnowing machine is in communication connection with the cut tobacco winnowing machine and controls the opening degree of the air door of the cut tobacco winnowing machine.
In some aspects, a computer readable storage medium is provided that stores computer instructions that, when executed by a processor, implement a method of controlling a damper opening of a leaf filament air classifier.
In some embodiments, a cut tobacco winnower is used to separate the stalk pieces from the tobacco cut tobacco.
In the present disclosure, the winnowing machine refers to a cut tobacco winnowing machine.
The present disclosure, if the following terms are used, is defined as follows
The term "cut tobacco" refers to cut tobacco leaves.
The term difference between X and Y denotes X-Y.
The term "damper opening" refers to the percentage of the current damper opening area to the maximum damper opening area.
Advantageous effects
According to some embodiments of the invention, by establishing the control method and system for the opening degree of the air door of the dried cut tobacco winnowing, the moisture content of the cut tobacco outlet and the flow of the electric balance after the secondary winnowing are brought into the control of the opening degree of the air door of the local winnowing equipment, so that the accurate control of the removal rate of the stems at the local winnowing outlet and the removal of the cut tobacco content in the stems can be quickly achieved, the automatic control is realized, the human intervention is reduced, and the purity of the finished cut tobacco is improved.
The disclosed methods have one or more of the following advantages:
the method can effectively control the rejection rate of the stems and the silk content in the rejected stems within the design range.
The method can effectively avoid the situation that stems and the like which are removed cannot be effectively removed, and increase the removing burden of the cigarette making machine; or the number of available cut tobacco in the rejected material is increased, and the material waste is increased.
Drawings
FIG. 1 is a schematic view of some embodiments of the method of the present invention for controlling the opening of a damper door of a leaf thread air classifier;
FIG. 2 is a schematic view of some embodiments of the system for controlling the opening of a damper of a leaf thread air classifier according to the present invention;
FIG. 3 is a schematic view of some embodiments of the apparatus for controlling the opening of a damper of a leaf thread air classifier according to the present invention;
FIG. 4 is a schematic view of some embodiments of the apparatus for producing cut tobacco according to the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Fig. 1 is a schematic diagram of some embodiments of the method of controlling the damper opening of a leaf thread air classifier according to the present invention. As shown in figure 1 of the drawings, in which,
the method for controlling the opening degree of the air door of the cut tobacco winnowing machine comprises the following steps:
and step 15, adjusting the opening degree of an air door of the cut tobacco winnowing machine according to the difference value.
When the air door aperture of cut tobacco winnowing mechanism is fixed, if the supplied material flow changes, the winnowing blanking flow is unstable, and then the stems and the like which should be removed cannot be effectively removed, so that the removing burden of a cigarette making machine is increased, or the number of available cut tobacco in the removed material is increased, and the material waste is increased. According to the method, the opening degree of the air door of the cut tobacco winnowing machine is adjusted according to the change of the material flow, so that the accurate control of the stem rejection rate of the cut tobacco winnowing machine and the rejection of the cut tobacco content in the stems can be quickly achieved, the automatic control is realized, the human intervention is reduced, and the purity of the finished cut tobacco is improved.
In addition, after the moisture content standardized conversion is carried out on the stalk flow measured value at the outlet of the winnowing machine, the stalk rejection amount of the cut tobacco winnowing machine can be more accurately reflected by the obtained stalk flow value with the standardized moisture content, and then the opening degree of an air door of the cut tobacco winnowing machine can be more accurately adjusted, so that all winnowing indexes conform to the design range. (see example 1)
In some embodiments, adjusting the current damper opening of the cut tobacco winnowing machine based on the difference comprises
If the difference value is within the preset interval range, adjusting the current air door opening of the cut tobacco winnowing machine to be equal to the preset opening;
if the difference value is larger than the upper limit value of the preset interval, adjusting the current air door opening of the cut tobacco winnowing machine to be smaller than the preset opening;
and if the difference value is smaller than the lower limit value of the preset interval, adjusting the current air door opening of the cut tobacco winnowing machine to be larger than the preset opening.
The method of the embodiment can effectively control the stem rejection rate of the cut tobacco winnowing machine and the rejected cut stem content in the stem within the range of the design value.
In some embodiments, adjusting the current damper opening of the cut tobacco winnowing machine according to the difference comprises the following operations;
if the difference value between the stem flow value with the standardized water content and the preset stem flow value is a kg/h, adjusting the current air door opening degree of the cut tobacco winnowing machine to enable the difference value between the current air door opening degree of the cut tobacco winnowing machine and the preset air door opening degree of the cut tobacco winnowing machine to be e%; wherein,
if a is in the range (-1.5,1.5), then e is 0;
when a is in the range of [1.5,5], the value range of e is [1,3], such as 1, 2 or 3;
when a is in the range of (5, 10), the value range of e is [2,4], such as 2, 3 or 4;
when a is in the range of [ -5, -1.5], the value of e is in the range of [ -3, -1], such as-3, -2 or-1;
when a is in the range of [ -10, -5), e is in the range of [ -4, -2], such as-4, -3 or-2;
-10≤a≤10，-4≤e≤4。
the method of the embodiment can more accurately control the stem rejection rate of the cut tobacco winnowing machine and the rejected cut stem content in the stem to be within the range of the design value.
In some embodiments, the cut tobacco winnowing machine receives cut tobacco output from the cut tobacco dryer, and the stem flow value at the outlet of the current winnowing machine refers to the current flow value of the cut tobacco at the outlet of the cut tobacco dryer.
In some embodiments, the cut tobacco winnowing machine is a multi-stage cut tobacco winnowing machine comprising a first cut tobacco winnowing mechanism and a second cut tobacco winnowing mechanism:
the first cut tobacco winnowing mechanism separates the stem primary material from cut tobacco;
separating the stem slivers from the primary stem slivers by the second leaf-shred winnowing mechanism;
adjusting the current air door opening of the cut tobacco winnowing machine comprises adjusting the current air door opening of a first cut tobacco winnowing mechanism and a second cut tobacco winnowing mechanism of the cut tobacco winnowing machine, and the step comprises the following steps:
if the difference value is within the preset interval range, adjusting the current air door opening degree of the first cut tobacco winnowing mechanism to be equal to a first preset opening degree; adjusting the opening degree of an air door of the second tobacco shred winnowing mechanism to be equal to a second preset opening degree;
if the difference value is larger than the upper limit value of the preset interval, adjusting the current air door opening of the first cut tobacco winnowing mechanism to be smaller than a first preset opening, and adjusting the air door opening of the second cut tobacco winnowing mechanism to be smaller than a second preset opening;
if the difference value is smaller than the lower limit value of the preset interval, adjusting the current air door opening of the first cut tobacco winnowing mechanism to be larger than a first preset opening, and adjusting the air door opening of the second cut tobacco winnowing mechanism to be larger than a second preset opening.
In some embodiments, adjusting the current damper opening of the first and second leaf filament winnowing mechanisms of the leaf filament winnowing machine comprises:
if the difference value between the stem flow value with the standardized water content and the preset stem flow value is a kg/h, adjusting the current air door opening degree of the first cut tobacco winnowing mechanism and the air door opening degree of the second cut tobacco winnowing mechanism to enable the difference value between the current air door opening degree of the first cut tobacco winnowing mechanism and the preset air door opening degree of the first cut tobacco winnowing mechanism to be e1Percent, the difference value of the current air door opening degree of the second leaf thread air separation mechanism and the preset air door opening degree of the second leaf thread air separation mechanism is e2Percent; wherein
If a is in the range (-1.5,1.5), e1、e2Are respectively 0;
when a is in [1.5,5]]In the range of e1Has a value range of [1,3]]For example, 1, 2 or 3,
e2has a value range of [0, 2]]For example 0, 1 or 2;
when a is in (5, 10)]In the range of e1Has a value range of [2,4]]E.g. 2, 3 or 4, e2Has a value range of [1,3]]For example 1, 2 or 3;
when a is [ -5, -1.5 [)]In the range of e1Has a value range of [ -3, -1 [)]E.g. 3, -2 or-1, e2Has a value range of [ -2, 0]]For example, -2, -1 or 0;
when a is in the range of [ -10, -5 ], e1Has a value range of [ -4, -2 [)]E.g. 4, -3 or-2, e2Has a value range of [ -3, -1 [)]For example, -3, -2 or-1;
-10≤a≤10，-4≤e1≤4，4≤e2≤4。
fig. 2 is a schematic diagram of some embodiments of a system for controlling the opening of a damper of a leaf thread air classifier according to the present invention. As shown in figure 2, the system for controlling the opening degree of the air door of the cut tobacco winnowing machine comprises
The stem flow value acquisition module 21 is used for acquiring a stem flow value at the outlet of the current winnowing machine;
the stem moisture content acquisition module 22 is used for acquiring the moisture content of the stems at the outlet of the air separator;
the standardization conversion module 23 is used for carrying out moisture content standardization conversion on the measured stem flow value at the outlet of the air separator to obtain a stem flow value with standardized moisture content;
the calculating module 24 is used for calculating the difference value between the stem flow value at the outlet of the current winnowing machine and the preset stem flow value of the cut tobacco winnowing machine;
and the air door opening adjusting module 25 is used for adjusting the current air door opening of the cut tobacco winnowing machine according to the difference value.
In some embodiments, the damper opening adjustment module adjusts the current damper opening of the cut tobacco winnowing machine according to the following rules:
if the difference value is within the preset interval range, adjusting the current air door opening of the cut tobacco winnowing machine to be equal to the preset opening;
if the difference value is larger than the upper limit value of the preset interval, adjusting the current air door opening of the cut tobacco winnowing machine to be smaller than the preset opening;
and if the difference value is smaller than the lower limit value of the preset interval, adjusting the current air door opening of the cut tobacco winnowing machine to be larger than the preset opening.
In some embodiments, the system is used to perform operations that implement a method of controlling a damper opening of a leaf thread air classifier.
Fig. 3 is a schematic view of some embodiments of the apparatus for controlling the opening of the damper of a leaf thread air separator according to the present invention. As shown in fig. 3, a device for controlling the opening degree of the air door of a cut tobacco winnowing machine comprises:
a memory 31 for storing instructions;
and the processor 32 is used for executing instructions so that the device for controlling the opening degree of the air door of the cut tobacco winnowing machine executes the operation for controlling the opening degree of the air door of the cut tobacco winnowing machine.
The means for controlling the damper opening of a leaf thread air classifier described above may be implemented as a general purpose processor, programmable logic controller (PLE) for performing the functions described herein2) Digital Signal Processor (DSP), application specific integrated circuit (ASIE)2) Field Programmable Gate Array (FPGA) or other programmable logic device, discreteGate or transistor logic, discrete hardware components, or any suitable combination thereof.
FIG. 4 is a schematic view of some embodiments of the apparatus for producing cut tobacco according to the present invention. As shown in FIG. 4, a tobacco processing apparatus comprises
The cut-tobacco drier 41 is provided with a drying machine,
a cut tobacco winnowing machine 42 for receiving cut tobacco output from the cut tobacco drying machine;
Wherein, the device 43 for controlling the opening degree of the air door of the cut tobacco winnowing machine is in communication connection with the cut tobacco drier 41, and acquires the stem flow value and the stem moisture content at the outlet of the cut tobacco winnowing machine 42; (ii) a
The device 43 for controlling the opening degree of the air door of the cut tobacco winnowing machine is in communication connection with the cut tobacco winnowing machine 42 and controls the opening degree of the air door of the cut tobacco winnowing machine 42.
In some embodiments, a computer readable storage medium is provided that stores computer instructions that, when executed by a processor, implement a method of controlling a damper opening of a leaf filament air classifier.
The process of the present application is further illustrated by the following specific examples.
Example 1
And (3) drying the cut tobacco by using a roller cut tobacco dryer to obtain dried cut tobacco with specific water content, and conveying the dried cut tobacco into multistage winnowing equipment for winnowing to screen out stem sticks, wet lumps, impurities and the like. The multistage winnowing equipment comprises a primary cut tobacco winnowing mechanism and a secondary cut tobacco winnowing mechanism, and the screening efficiency of winnowing can be adjusted by controlling the opening degree of an air door of the cut tobacco winnowing mechanism. A moisture detector is arranged at the outlet of the roller cut tobacco dryer and is used for detecting the moisture content (namely the moisture content of the cut tobacco to be fed into the winnowing machine) M of the cut tobacco at the outlet1. An electric scale is arranged at the outlet of the secondary air separation mechanism and is used for weighing the actually measured flow value S of the stems rejected at the outlet of the secondary air separation mechanism1。
To the measured value S of the stem flow at the outlet of the winnowing machine1And carrying out water content standardization conversion to obtain a stem flow value S with standardized water content. Specifically, S is obtained by calculation according to the following formula:
wherein,
the leaf shred winnowing machine is provided with a stem electric scale S1The measured value (kg/h) of the stalk flow at the current outlet of the leaf shred winnowing machine is measured by a stalk electric scale;
m is the estimated value of the moisture content of the removed stems, and M is equal to M1+g。M1The moisture content (%) of the cut tobacco to be fed into the air separator is the moisture content (%) of the cut tobacco at the outlet of the cut tobacco dryer. g is an empirical value. And g, M '-M1', M 'is the average value of the moisture content of the stem slivers at the outlet of the multiple batches of air separation machines, and M1' is the average value of the moisture content of the cut tobacco shreds to be fed into the air separation machines.
C is a normalized water content, and in this example, C is 0.12.
In this embodiment, the design value S of the stem flow value S with normalized water content045 plus or minus 1.5kg/h, the design value of the rejection rate of the stem is 1.0 to 1.5 percent, and the design value of the rejection rate of the stem containing silk content is 12.5 to 16.0 percent.
The specific control method of the air door opening degree of the primary air separation structure and the secondary cut tobacco air separation mechanism is as follows:
the stem flow value S is equal to S at the outlet of the winnowing machine0When the speed is 45kg/h, the opening degree of an air door of the first cut tobacco winnowing mechanism is adjusted to be equal to P1＝P061%, and adjusting the opening of the air door of the second tobacco shred winnowing mechanism to be equal to Q1＝Q0＝58％。P0Is the preset air door opening degree, Q, of the first cut tobacco winnowing mechanism0Is the preset air door opening of the second tobacco shred winnowing mechanism.
When a is within (-1.5,1.5), e1、e2Are respectively 0;
when a is in [1.5,5]]Inner, e1Has a value of 3, e2Is 3;
when a is in (5, 10)]Inner, e1Has a value of 4, e2Is 4;
when a is [ -5, -1.5 [)]Inner, e1Is taken as-2，e2Is-1;
when a is in [ -10, -5), e1Has a value of-4, e2The value of (a) is-2;
-10≤a≤10，-4≤e1≤4，-4≤e2≤4。
for example, the moisture content of cut tobacco at the outlet of the cut tobacco dryer (i.e., the moisture content M of cut tobacco to be fed into the air separator)1) 12.9 percent, when the measured flow value of stems at the outlet of the cut tobacco winnowing machine is 48kg/h, the system can automatically adjust the primary air door opening of the cut tobacco winnowing equipment to 64 percent, and adjust the secondary air door opening to 61 percent.
5 batches of different flow rates of cut tobacco were processed using the method of example 1. The rejection rate and the cut content of the rejected stems are shown in the following table 1:
TABLE 1
Rejection rate of stems: after the dried cut tobacco leaves are subjected to secondary air separation, the removed stems account for the percentage of the total input amount of the tobacco strips.
Removing cut stem cut content: in the removed stem obtained after the secondary air separation, the weight of the cut leaves accounts for the total weight of the removed stem.
As can be seen from the above table, the stem rejection rate of the cut tobacco batches of 1 to 5 in the embodiment is within the range of (45 +/-1.5) kg/h of the stem flow at the outlet of the air separator, and the cut tobacco content in the rejected stem is within the range of 12.5 to 16.0 percent, so that the process requirements are met.
Comparative example 1
Comparative example 1 was identical to the process conditions of example 1 except that the primary and secondary damper opening degrees were set to fixed values of 61% and 58%.
The flow of the stems at the outlet of the winnowing machine of the batches of leaf shreds of comparative examples 2, 3 and 5 is out of the range of (45 +/-1.5) kg/h of the flow of the stems at the outlet of the winnowing machine, and the removed stems contain 12.5-16.0 percent of shreds, which do not meet the process requirements.
While specific embodiments of the invention have been described in detail, those skilled in the art will understand that: various modifications and changes in detail can be made in light of the overall teachings of the disclosure, and such changes are intended to be within the scope of the present invention. The full scope of the invention is given by the appended claims and any equivalents thereof.
Claims (14)
1. A method for controlling the opening degree of an air door of a cut tobacco winnowing machine comprises the following steps:
acquiring a measured stem flow value at an outlet of the winnowing machine;
acquiring the moisture content of the stems at the outlet of the winnowing machine;
carrying out moisture content standardization conversion on the measured stem flow value at the outlet of the winnowing machine to obtain a stem flow value with standardized moisture content;
calculating the difference value between the stem flow value with the standardized water content and a preset stem flow value;
and adjusting the opening degree of an air door of the cut tobacco winnowing machine according to the difference value.
2. The method of claim 1, wherein the first and second light sources are selected from the group consisting of,
the stem flow value S with the standardized water content is obtained by conversion according to the following formula:
wherein,
S1the measured stem flow value (kg/h) at the outlet of the winnowing machine is obtained;
m is the moisture content of the stems at the outlet of the air separator;
and C is the preset standardized water content.
3. The method of claim 2, having one or more of the following features:
·M＝M1+(M'-M1')，M1the moisture content value (%) of the cut tobacco to be fed into the air separator, M' is the mean value of the moisture content of the stems at the outlet of the air separator in batches, M1The mean value of the water content of a plurality of batches of leaf shreds to be fed into the air separator;
·C＝0.1～0.2。
4. the method of claim 1, wherein adjusting the current damper opening of the cut tobacco winnowing machine based on the difference comprises adjusting the current damper opening of the cut tobacco winnowing machine based on the difference
If the difference value is within the preset interval range, adjusting the current air door opening of the cut tobacco winnowing machine to be equal to the preset opening;
if the difference value is larger than the upper limit value of the preset interval, adjusting the current air door opening of the cut tobacco winnowing machine to be smaller than the preset opening;
and if the difference is smaller than the lower limit value of the preset interval, adjusting the current air door opening of the cut tobacco winnowing machine to be larger than the preset opening.
5. The method of claim 1, wherein said adjusting a current damper opening of a leaf shred air separator based on said difference comprises
If the difference value between the stem flow value with the standardized water content and the preset stem flow value is a kg/h, adjusting the current air door opening degree of the cut tobacco winnowing machine to enable the difference value between the current air door opening degree of the cut tobacco winnowing machine and the preset air door opening degree of the cut tobacco winnowing machine to be e%; wherein,
when a is within (-1.5,1.5), the value of e is 0;
when a is in the range of [1.5,5], the value range of e is [1,3 ];
when a is in the range of (5, 10), the value range of e is [2,4 ];
when a is in the range of [ -5, -1.5], the value range of e is [ -3, -1 ];
when a is in the range of [ -10, -5 ], the value of e is in the range of [ -4, -2 ];
a is more than or equal to-10 and less than or equal to 10, the unit of e is%, -4 and less than or equal to 4.
6. The method of claim 3, wherein said cut tobacco winnowing machine receives cut tobacco output from a cut tobacco dryer, and said moisture content value of the cut tobacco to be fed to the winnowing machine is the moisture content value of the cut tobacco at the exit of the cut tobacco dryer.
7. The method of claim 1, wherein,
the leaf silk air separator is multistage leaf silk air separator, multistage leaf silk air separator includes first leaf silk winnowing mechanism and second leaf silk winnowing mechanism:
the first cut tobacco winnowing mechanism separates the stem primary material from cut tobacco;
separating the stem slivers from the primary stem slivers by a second leaf shred winnowing mechanism;
the measured stem flow value at the outlet of the winnowing machine is the flow value of the stems separated from the primary stem material by the second leaf shred winnowing mechanism;
the air door aperture of adjustment leaf silk air separator is including the current air door aperture of first leaf silk air separator mechanism and the second leaf silk air separator mechanism of adjustment leaf silk air separator, wherein:
if the difference value is within the preset interval range, adjusting the current air door opening degree of the first cut tobacco winnowing mechanism to be equal to a first preset opening degree; adjusting the opening degree of an air door of the second tobacco shred winnowing mechanism to be equal to a second preset opening degree;
if the difference value is larger than the upper limit value of the preset interval, adjusting the current air door opening of the first cut tobacco winnowing mechanism to be smaller than a first preset opening, and adjusting the air door opening of the second cut tobacco winnowing mechanism to be smaller than a second preset opening;
and if the difference value is smaller than the lower limit value of the preset interval, adjusting the current air door opening of the first cut tobacco winnowing mechanism to be larger than a first preset opening, and adjusting the air door opening of the second cut tobacco winnowing mechanism to be larger than a second preset opening.
8. The method of claim 7, wherein adjusting the current damper opening of the first and second leaf filament winnowing mechanisms of the leaf filament winnowing machine comprises:
if the difference value between the stem flow value with the standardized water content and the preset stem flow value is a kg/h, adjusting the current value of the first cut tobacco winnowing mechanismThe difference value between the current air door opening of the first cut tobacco winnowing mechanism and the preset air door opening of the first cut tobacco winnowing mechanism is e1Percent, the difference value of the current air door opening degree of the second leaf thread air separation mechanism and the preset air door opening degree of the second leaf thread air separation mechanism is e2％；
Wherein,
when a is in the range of (-1.5,1.5), e1、e2Are respectively 0;
when a is in [1.5,5]]In the range of e1Has a value range of [1,3]]，e2Has a value range of [0, 2]]；
When a is in (5, 10)]In the range of e1Has a value range of [2,4]]，e2Has a value range of [1,3]]；
When a is [ -5, -1.5 [)]In the range of e1Has a value range of [ -3, -1 [)]，e2Has a value range of [ -2, 0]]；
When a is in the range of [ -10, -5 ], e1Has a value range of [ -4, -2 [)]，e2Has a value range of [ -3, -1 [)]；
-10≤a≤10，-4≤e1≤4，-4≤e2≤4。
9. A system for controlling the opening degree of an air door of a cut tobacco winnowing machine comprises
The stem flow value acquisition module is used for acquiring a stem flow value at the outlet of the current winnowing machine;
the stem moisture content acquisition module is used for acquiring the moisture content of the stems at the outlet of the winnowing machine;
the standardization conversion module is used for carrying out standardization conversion on the moisture content of the measured stem flow value at the outlet of the air separator to obtain a stem flow value with standardized moisture content;
the calculation module is used for calculating the difference value between the stem flow value at the outlet of the current winnowing machine and the preset stem flow value of the cut tobacco winnowing machine;
and the air door opening adjusting module is used for adjusting the current air door opening of the cut tobacco winnowing machine according to the difference value.
10. The system of claim 9, the system to perform operations to implement the method of any of claims 1-8.
11. A device for controlling the opening degree of an air door of a cut tobacco winnowing machine comprises:
a memory to store instructions;
a processor configured to execute the instructions to cause the device for controlling the opening of a damper of a leaf thread air separator to perform operations to implement the method of any one of claims 1-8.
12. A cut tobacco processing apparatus comprising the system for controlling the opening degree of a damper of a cut tobacco separator according to claim 9 or 10, or the device for controlling the opening degree of a damper of a cut tobacco separator according to claim 11.
13. The leaf filament processing apparatus of claim 12, further comprising
The cut tobacco drying machine is used for drying the raw material cut tobacco;
the cut tobacco winnowing machine receives cut tobacco output from the cut tobacco drying machine;
the system for controlling the opening degree of the air door of the cut tobacco winnowing machine or the device for controlling the opening degree of the air door of the cut tobacco winnowing machine is in communication connection with the cut tobacco drier, and a stem flow value and a stem moisture content at the outlet of the cut tobacco winnowing machine are collected;
the system for controlling the opening degree of the air door of the cut tobacco winnowing machine or the device for controlling the opening degree of the air door of the cut tobacco winnowing machine is in communication connection with the cut tobacco winnowing machine and controls the opening degree of the air door of the cut tobacco winnowing machine.
14. A computer-readable storage medium storing computer instructions which, when executed by a processor, implement the method of any one of claims 1-8.
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| CN101823055A (en) * | 2010-03-30 | 2010-09-08 | 广东中烟工业有限责任公司 | Air quantity control system of tobacco shred winnowing machine |
| CN201878746U (en) * | 2010-11-16 | 2011-06-29 | 湖北中烟工业有限责任公司 | Visualized uniform ventilation door regulating device of tunnel tobacco shred dryer |
| CN202169249U (en) * | 2011-06-16 | 2012-03-21 | 湖北中烟工业有限责任公司 | Cut stem separating chamber for secondary air separation of cigarette making unit |
| CN102771883B (en) * | 2012-08-07 | 2015-02-18 | 厦门烟草工业有限责任公司 | Online sliver separating device for high moisture content cut tobaccos and separating method of online sliver separating device |
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