CN112641124B - Method and system for controlling consistency of processing strength of tobacco roller type warming equipment - Google Patents
Method and system for controlling consistency of processing strength of tobacco roller type warming equipment Download PDFInfo
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- CN112641124B CN112641124B CN202011563819.0A CN202011563819A CN112641124B CN 112641124 B CN112641124 B CN 112641124B CN 202011563819 A CN202011563819 A CN 202011563819A CN 112641124 B CN112641124 B CN 112641124B
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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
- A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
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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
- A24B9/00—Control of the moisture content of tobacco products, e.g. cigars, cigarettes, pipe tobacco
Abstract
The invention discloses a method and a system for controlling the consistency of processing strength of tobacco roller type warming equipment: setting the expected processing strength of the drying and humidifying equipment; according to the formula
Calculating the actual processing strength of the drying equipment, G being the processing strength, B 1 Temperature in zone 1 of the vessel wall, B 2 Is the temperature of zone 2 of the cylinder wall, L 1 Is the length of 1 zone dry section, L 2 Is 2 zones in length, L is total length of drying equipment, R is hot air temperature, T 1 For the material residence time, or according to the formula S = H + lnT 2 Calculating the actual processing intensity of the humidifying equipment, wherein S is the processing intensity, H is the return air temperature, and T is 2 The residence time of the material; and judging whether the difference value between each actual processing strength and the expected processing strength is smaller than a set threshold value, if not, adjusting the temperature of the cylinder wall or the temperature of hot air and the temperature of return air to enable the difference value to be smaller than the set threshold value. The invention can improve the consistency of the tobacco shred making quality and the consistency level of cigarette processing.
Description
Technical Field
The invention relates to the technical field of cigarette production assistance, in particular to a method and a system for controlling the consistency of processing strength of tobacco roller type warming equipment.
Background
The tobacco roller type heating equipment is the key equipment in the tobacco shred manufacturing process. A large number of researches show that roller type temperature increasing equipment in the tobacco shred manufacturing process flow is a key processing link influencing the physical, chemical and sensory quality of tobacco products, and the change degree of the quality characteristics of the tobacco products is closely related to the processing strength of the equipment. With the rapid growth of certain cigarette brands, there are increasingly situations in the cigarette production process where a plurality of different production lines produce the same brand of cigarette product. At present, the roller warming equipment used at different processing points has great differences in the aspects of production capacity, equipment structure, control mode and the like, and how to accurately represent the processing strength of the tobacco roller warming equipment and how to ensure the homogenization processing of the equipment becomes a problem to be solved urgently. On the other hand, even if the same or similar drum type heating equipment is used, the quality of the tobacco shreds processed in different lines can be different due to the difference of environmental climate conditions, steam medium conditions and the like of production in different places. Therefore, the method accurately represents the processing strength of the tobacco roller type heating equipment and realizes the homogenization of the processing process of the tobacco roller type heating equipment, and becomes the key of the homogenization production in the tobacco shred processing technology.
Therefore, a method and a system for controlling the processing strength consistency of the tobacco roller type warming equipment are needed.
Disclosure of Invention
The invention aims to provide a method and a system for controlling the processing strength consistency of tobacco roller type temperature raising equipment, which solve the problems that the quality difference of tobacco shreds at different processing points is large and the homogenization processing cannot be realized when the conventional tobacco roller type temperature raising equipment raises the temperature, can improve the quality consistency of tobacco shred preparation and improve the consistency level of cigarette processing.
The invention provides a method for controlling consistency of processing strength of tobacco roller type warming equipment, which comprises the following steps:
setting a desired processing strength of a drying apparatus and/or a moistening apparatus of a tobacco drum drying line;
acquiring the cylinder wall temperature, the hot air temperature, the length of each drying section and the residence time of a first material of drying equipment, and/or the return air temperature and the residence time of a second material of humidifying equipment;
according to the formula
Calculating to obtain the actual processing strength of the drying equipment, wherein G represents the processing strength, and B represents the processing strength 1 Indicating the temperature of zone 1 of the drum wall, B 2 Indicating the temperature, L, of zone 2 of the drum wall 1 Denotes the length of the drying zone of the drum 1, L 2 The length of the drying section in the drum 2 area is shown, L is the total length of the drum drying equipment, R is the temperature of hot air, T 1 Representing the residence time of the material in the drum of the drying apparatus, and/or according to the formula S = H + lnT 2 Calculating the actual processing intensity of the humidifying equipment, wherein S represents the processing intensity, H represents the return air temperature, and T represents the return air temperature 2 Representing the residence time of the material in the drum of the humidifying equipment;
and judging whether the difference value between the actual processing intensity of the drying equipment and/or the humidifying equipment and the corresponding expected processing intensity is smaller than a set threshold value, if not, adjusting the temperature of the barrel wall and/or the temperature of hot air and/or the temperature of return air to enable the difference value to be smaller than the set threshold value.
The method for controlling consistency of processing strength of the tobacco roller type heating equipment as described above preferably further comprises:
the processing strength of the drying equipment is controlled by adjusting the HT working steam flow or the water content of the inlet material, the temperature of the cylinder wall is adjusted by increasing or decreasing the HT working steam flow or the water content of the inlet material, and/or the processing strength of the humidifying equipment is controlled by adjusting the return air temperature.
The method for controlling consistency of processing strength of the tobacco roller type warming equipment as described above, wherein the adjusting the wall temperature and/or the hot air temperature and/or the return air temperature so that the difference is smaller than the set threshold value preferably includes:
for the drying equipment, if the actual processing strength is smaller than the expected processing strength, the temperature of the cylinder wall is increased by increasing the flow rate of HT working steam or the water content of the inlet material; if the actual processing intensity of the drying equipment is greater than the expected processing intensity, reducing the temperature of the cylinder wall by reducing the flow rate of the HT working steam or the water content of the inlet material; and/or
For a humidification apparatus, if the actual process strength is less than the expected process strength, increasing the actual process strength by increasing a return air temperature; if the actual process strength of the humidification apparatus is greater than the expected process strength, the actual process strength is reduced by reducing the return air temperature.
The method for controlling consistency of processing strength of the tobacco roller type warming equipment as described above preferably further comprises:
setting a target value of the water content of a first outlet material for drying equipment, and establishing a PID control model of the hot air speed or the moisture-removing negative pressure of a roller and the water content of the outlet material, so that the hot air speed or the moisture-removing negative pressure is adjusted along with the target value of the water content of the first outlet material; and/or
And for the humidifying equipment, setting a second outlet material water content target value, and establishing a PID control model of the water adding amount and the outlet material water content so as to adjust the water adding amount along with the second outlet material water content target value.
The method for controlling consistency of processing strength of the tobacco roller type warming equipment as described above, wherein preferably, the adjusting the wind speed or the moisture-removing negative pressure of the hot wind to follow the target value of the moisture content of the first outlet material includes:
acquiring a measured value of the water content of a first outlet material of a roller of drying equipment, and obtaining a target deviation value of the water content of the first outlet material according to the target value of the water content of the first outlet material and the measured value of the water content of the first outlet material;
the PID control model controls the hot air wind speed or the moisture-removing negative pressure according to the target deviation value of the water content of the first outlet material, so that the water content of the first outlet material is adjusted according to the target value of the water content of the first outlet material,
the make the water addition volume follow the second export material moisture content target value is adjusted, includes:
acquiring a measured value of the water content of an inlet material and a measured value of the water content of a second outlet material of a roller of a humidifying device, and acquiring a target deviation value of the water content of the second outlet material according to the target value of the water content of the second outlet material and the measured value of the water content of the second outlet material;
and the PID control model controls the water adding amount according to the target deviation value of the second outlet material water content and the actual measurement value of the inlet material water content, so that the second outlet material water content is adjusted according to the second outlet material water content target value.
The method for controlling consistency of processing strength of the tobacco roller type warming equipment preferably includes the following steps:
acquiring the water content of the first outlet material, the wind speed of the hot air and the moisture-removing negative pressure in a set time in real time, and fitting according to a time relation to obtain a first fitting curve of the water content of the first outlet material and the wind speed of the hot air or the moisture-removing negative pressure;
controlling the hot air wind speed or the moisture removal negative pressure of a roller of the drying equipment according to the first fitting curve,
the messenger add the water yield and follow the second export material moisture content target value is adjusted, still includes:
acquiring the water content of the inlet material, the water content of the second outlet material and the water adding amount within set time in real time, and fitting according to a time relation to obtain a second fitting curve of the water content of the second outlet material, the water content of the inlet material and the water adding amount;
controlling the water addition amount of the roller of the humidifying equipment according to the second fitted curve.
The invention also provides a control system for the consistency of the processing strength of the tobacco roller type warming equipment, which comprises the following components:
a first setting unit for setting a desired working strength of a drying apparatus and/or a humidifying apparatus of a tobacco drum drying line;
the first acquisition unit is used for acquiring the cylinder wall temperature, the hot air temperature, the length of each drying section and the residence time of a first material of the drying equipment, and/or the return air temperature and the residence time of a second material of the humidifying equipment;
a calculation unit for calculating according to a formula
Calculating to obtain the actual processing strength of the drying equipment, wherein G represents the processing strength, and B represents the processing strength 1 Indicating the temperature of zone 1 of the drum wall, B 2 Indicating the temperature, L, of the zone 2 of the drum wall 1 Denotes the length of the drying zone of the drum 1, L 2 The length of the drying section in the drum 2 area is shown, L is the total length of the drum drying equipment, R is the temperature of hot air, T 1 Representing the residence time of the material in the drum of the drying apparatus, and/or according to the formula S = H + lnT 2 Calculating the actual processing strength of the humidifying equipment, wherein S represents the processing strength, H represents the return air temperature, and T represents the actual processing strength 2 Representing the residence time of the material in the drum of the humidifying equipment;
and the first control unit is used for judging whether the difference value between the actual processing intensity of the drying equipment and/or the humidifying equipment and the corresponding expected processing intensity is smaller than a set threshold value, and if not, adjusting the barrel wall temperature and/or the hot air temperature and/or the return air temperature to enable the difference value to be smaller than the set threshold value.
The method for controlling consistency of processing strength of the tobacco roller type heating equipment as described above preferably further comprises:
the second control unit is used for controlling the processing strength of the drying equipment by adjusting the HT working steam flow or the water content of the inlet material, adjusting the temperature of the cylinder wall by increasing or decreasing the HT working steam flow or the water content of the inlet material, and/or controlling the processing strength of the humidifying equipment by adjusting the return air temperature.
The method for controlling consistency of processing strength of the tobacco roller type warming equipment as described above preferably further comprises:
the PID control unit is used for setting a first outlet material moisture content target value for the drying equipment, and establishing a PID control model of the hot air speed or the moisture-removing negative pressure of the roller and the outlet material moisture content so as to adjust the hot air speed or the moisture-removing negative pressure along with the first outlet material moisture content target value; and/or setting a second outlet material water content target value for the humidifying equipment, and establishing a PID control model of the water adding amount and the outlet material water content so as to adjust the water adding amount along with the second outlet material water content target value.
In the method for controlling consistency of processing strength of tobacco drum type heating equipment, it is preferable that the PID control means includes:
the deviation value adjusting unit is used for acquiring a measured value of the water content of the first outlet material of the roller of the drying equipment and obtaining a target deviation value of the water content of the first outlet material according to the target value of the water content of the first outlet material and the measured value of the water content of the first outlet material; the PID control model controls the hot air speed or the moisture discharge negative pressure according to the target deviation value of the water content of the first outlet material, so that the water content of the first outlet material is adjusted according to the target value of the water content of the first outlet material, and/or the PID control model is used for obtaining an actual measurement value of the water content of an inlet material and an actual measurement value of the water content of a second outlet material of a roller of the humidifying equipment, and obtaining a target deviation value of the water content of the second outlet material according to the target value of the water content of the second outlet material and the actual measurement value of the water content of the second outlet material; the PID control model controls the water adding amount according to the target deviation value of the water content of the second outlet material and the measured value of the water content of the inlet material, so that the water content of the second outlet material is adjusted according to the target value of the water content of the second outlet material;
the fitting curve adjusting unit is used for acquiring the water content of the first outlet material, the wind speed of the hot air and the moisture-removing negative pressure in a set time in real time, and fitting according to a time relation to obtain a first fitting curve of the water content of the first outlet material and the wind speed of the hot air or the moisture-removing negative pressure; and/or acquiring the water content of the inlet material, the water content of the second outlet material and the water adding amount within set time in real time, and fitting according to a time relation to obtain a second fitting curve of the water content of the second outlet material, the water content of the inlet material and the water adding amount;
the fitting curve adjusting unit is also used for controlling the hot air wind speed or the moisture removal negative pressure of the drum of the drying equipment according to the first fitting curve and/or controlling the water adding amount of the drum of the humidifying equipment according to the second fitting curve.
The invention provides a method and a system for controlling the consistency of the processing strength of tobacco roller type warming equipment. The tobacco rolling type temperature increasing device solves the problems that the existing tobacco rolling type temperature increasing devices have large quality difference of tobacco shreds at different processing points and can not realize homogenization processing, and can improve the consistency of the tobacco shred making quality and the consistency level of the cigarette processing quality.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a method for controlling consistency of processing strength of tobacco roller type warming equipment provided by the invention;
FIG. 2 is a control flow chart of the consistency of the processing strength of the tobacco roller type warming equipment provided by the invention.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
As used in this disclosure, "first", "second": and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present disclosure, when a specific component is described as being located between a first component and a second component, there may or may not be intervening components between the specific component and the first component or the second component. When it is described that a specific component is connected to other components, the specific component may be directly connected to the other components without having an intervening component, or may be directly connected to the other components without having an intervening component.
All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
Aiming at the problems that the quality difference of tobacco shreds produced at different processing points is large and homogenization cannot be realized in the conventional tobacco roller type temperature increasing equipment. The invention provides a method for controlling the strength consistency of tobacco roller type warming equipment, which is characterized in that the expected processing strength of a production line of the expected tobacco roller type warming equipment is set, the wall temperature, the hot air temperature, the return air temperature, the length of each drying section and the material retention time of the tobacco material roller type warming equipment are acquired, the actual processing strength of the roller type warming drying equipment and the actual processing strength of the roller type warming and humidifying equipment are respectively calculated on the basis of the data, and the processing strength is controlled according to the difference value between the actual processing strength and the expected processing strength. The tobacco cylinder type heating device solves the problems that the existing tobacco cylinder type heating device has large quality difference of tobacco shreds at different processing points and can not realize homogenization processing, and can improve the quality consistency of tobacco shred preparation and the quality consistency level of cigarette processing.
As shown in fig. 1, the method for controlling consistency of processing strength of tobacco roller type warming equipment provided by this embodiment specifically includes the following steps in an actual implementation process:
s1, setting the expected processing strength of drying equipment and/or humidifying equipment of a tobacco roller drying production line.
And S2, acquiring the cylinder wall temperature, the hot air temperature, the length of each drying section and the residence time of the first material of the drying equipment, and/or the return air temperature and the residence time of the second material of the humidifying equipment.
Step S3, according to the formula
Calculating to obtain the actual processing strength of the drying equipment, wherein G represents the processing strength, and B represents the processing strength 1 Indicating the temperature of zone 1 of the drum wall, B 2 Indicating the temperature, L, of zone 2 of the drum wall 1 Denotes the length of the drying zone of the drum 1, L 2 Showing the length of the drying section in the area of the roller 2, L showing the total length of the roller drying equipment, R showing the temperature of hot air and T 1 Representing the residence time of the material in the drum of the drying apparatus, and/or according to the formula S = H + lnT 2 Calculating the actual processing strength of the humidifying equipment, wherein S represents the processing strength, H represents the return air temperature, and T represents the actual processing strength 2 Representing the residence time of the material in the drum of the moistening device.
And S4, judging whether the difference value between the actual processing intensity of the drying equipment and/or the humidifying equipment and the corresponding expected processing intensity is smaller than a set threshold value, and if not, adjusting the temperature of the cylinder wall and/or the temperature of hot air and/or the temperature of return air to enable the difference value to be smaller than the set threshold value.
Specifically, the drum type warming equipment mainly comprises two types of equipment, one type is drying equipment, the other type is humidifying equipment, and the drum wall temperature, the hot air temperature, the length of each drying section and the material residence time of the drum type drying equipment for the tobacco materials of the original production line are acquired; according to the formula
Calculating to obtain actual processing strength G0 of the drying equipment, wherein G represents the processing strength, and B 1 Indicating the temperature of the cylinder wall 1 area, unit ℃; b 2 The temperature of the 2 regions of the drum wall is expressed in unit; l is a radical of an alcohol 1 The length of the drying section in the roller 1 area is expressed in mm; l is a radical of an alcohol 2 The length of the drying section in the area of the roller 2 is expressed in mm; l represents the total length of the roller type drying equipment and is in mm; r represents the temperature of hot air in units; t is 1 Which represents the residence time of the material in the drum of the drying apparatus in units of s.
Collecting the return air temperature and the material retention time of the roller type warming and humidifying equipment for the tobacco materials in the original production line; according to the formula S = H + lnT 2 Calculating to obtain the actual processing strength S0 of the drying equipment, wherein S representsProcessing strength, H represents return air temperature, unit ℃; t is 2 Which represents the residence time of the material in the drum of the drying apparatus, in units of s.
Determination of the residence time of the materials: after the equipment runs stably, recording the material flow W, unit kg/h; then all materials in the roller are taken out while the feeding device in front of the roller is stopped, and the taken out materials are weighed and recorded as Z in unit kg. The material residence time can be characterized as
The method comprehensively considers two factors of temperature and time which influence the processing strength: the heated temperature of the tobacco shreds is represented by the cylinder wall temperature and the hot air temperature of the cut tobacco dryer, so that the problem that a complex cut tobacco heated test program is difficult to accurately quantify is solved, and meanwhile, the sectional drying processing strength of the cut tobacco shreds is calculated in sections, so that the applicability of the processing strength calculation is enhanced; the residence time of the material is accurately measured, and meanwhile, the natural logarithm is taken for the time, so that the influence of the processing time on the processing strength is weakened, and the actual influence degree is closer to the actual influence degree.
In one embodiment, as shown in fig. 2, the specific steps of regulating the consistency of the processing strength of the tobacco roller type warming equipment are as follows:
1. normally loosening and dampening, feeding and roller cut tobacco drying production in a line A (original production line), if the loosening and dampening return air temperature is 55 ℃, the feeding return air temperature is 60 ℃, the temperatures of a 1 region and a 2 region of a roller cut tobacco drying cylinder wall are both 120 ℃, the hot air temperature is 110 ℃, and the length of each drying section of the original production line roller type warming drying equipment and the material residence time of each equipment are detected by a system.
2. According to the calculation method of the processing strength S and G introduced in the invention, the processing strength of loosening and dampening of the A line, feeding and drying of the cut tobacco roller is calculated to be SS0, SJ0 and G0 respectively.
The processing strength expression of the roller humidifying equipment is as follows: s = H + lnT, calculating the actual processing strength S0 of the drying equipment, wherein S represents the processing strength, H represents the return air temperature and the unit is C; t represents the residence time of the material in the drum of the drying equipment, and the unit is s;
the processing strength expression of the roller drying equipment is as follows:
calculating to obtain the actual processing strength of the drying equipment, wherein G represents the processing strength, and B represents the processing strength 1 The temperature of the cylinder wall 1 area is expressed in unit; b 2 The temperature of the cylinder wall 2 area is expressed in unit; l is a radical of an alcohol 1 The length of the drying section in the roller 1 area is expressed in mm; l is 2 The length of the drying section in the area of the roller 2 is expressed in mm; l represents the total length of the roller type drying equipment and is in mm; r represents the temperature of hot air in units; t represents the residence time of the material in the drum of the drying apparatus, in units of s.
3. And (3) performing a small batch test on the B line (which is another production line) by adopting the same processing parameters (except material flow), setting the loosening and conditioning return air temperature to be 55 ℃, the feeding return air temperature to be 60 ℃, the temperatures of the 1 region and the 2 region of the cylinder wall of the cylinder drying cylinder to be 140 ℃ and 120 ℃, the hot air temperature to be 110 ℃, detecting the lengths of the drying sections of the cylinder type warming and drying equipment of the original production line by a system, keeping the materials of the equipment for a certain time, and calculating the processing strengths of loosening and conditioning, feeding and drying the leaf thread cylinder of the B line to be SS1, SJ1 and G1 respectively.
4. The sizes of SS1, SJ1, and G1 are compared with SS0, SJ0, and G0, respectively. If SS 1 -SS 0 |≤2、|SJ 1 -SJ 0 Less than or equal to 2 or G 1 -G 0 If the | is less than or equal to 2, the processing strength of the line A and the line B is similar, and normal production can be carried out according to the test processing parameters of the line B. If SS 1 -SS 0 |＞2、|SJ 1 -SJ 0 | G > 2 or | G 1 -G 0 If the value is greater than 2, a small batch test needs to be carried out again, and the processing parameters of the B line are adjusted to correct the processing strength of the material.
5. When the technological parameters of the B line need to be adjusted, loosening and dampening and feeding are only needed to adjust the temperature of hot air; for the roller drying, the barrel wall temperature is preferably adjusted by adjusting the HT working steam flow, and the processing strength of the B line is adjusted in a small range.
(1) When the processing strength G1 is less than G0, the two processing strengths tend to be consistent by adopting a mode of increasing the HT working steam flow rate and increasing the temperature of the cylinder wall.
(2) When the processing strength G1 is greater than G0, the processing strength of two places is consistent by reducing the HT working steam flow and reducing the temperature of the cylinder wall.
6. If the proper regulation range of the HT working steam flow is 100-450 kg/h, the requirement of consistent processing strength of two places still cannot be met in the proper regulation range of the HT working steam flow, the water content of the cut tobacco drying inlet is regulated by regulating the water content of the fed material, and therefore the temperature of the cylinder wall is changed to enable the processing strength to be consistent.
(1) When the processing strength G1 is less than G0, the moisture content of the tobacco shred drying inlet is increased by increasing the moisture content of the material after feeding, so that the processing strength of two places tends to be consistent by improving the temperature of the cylinder wall of the tobacco shred drying machine.
(2) When the processing strength G1 is greater than G0, the moisture content of the cut tobacco drying inlet is reduced by reducing the moisture content of the material after feeding, so that the processing strength of two places tends to be consistent by reducing the temperature of the cylinder wall of the cut tobacco dryer.
By the adjusting method, the processing parameters after the B line adjustment are used as the conditions for the quality consistency processing of the line roller type heating equipment.
On the premise of ensuring consistent processing strength, the method is adopted to adjust the water content of the material outlet to meet the design requirement through a PID association program.
As shown in fig. 1, the method further comprises:
and S5, controlling the processing strength of the drying equipment by adjusting the HT working steam flow or the water content of the inlet material, adjusting the temperature of the cylinder wall by increasing or decreasing the HT working steam flow or the water content of the inlet material, and/or controlling the processing strength of the humidifying equipment by adjusting the return air temperature.
Further, the adjusting the temperature of the drum wall and/or the temperature of the hot air and/or the temperature of the return air to make the difference value smaller than the set threshold value includes: for the drying equipment, if the actual processing strength is smaller than the expected processing strength, the temperature of the cylinder wall is increased by increasing the flow rate of HT working steam or the water content of the inlet material; if the actual processing strength of the drying equipment is greater than the expected processing strength, reducing the temperature of the cylinder wall by reducing the flow rate of the HT working steam or the water content of the inlet material; and/or for a humidification apparatus, increasing the actual process strength by increasing the return air temperature if the actual process strength is less than the expected process strength; if the actual process strength of the humidifier apparatus is greater than the expected process strength, the actual process strength is reduced by reducing the return air temperature.
The adjusting the temperature of the cylinder wall or the temperature of the hot air to make the difference smaller than the set threshold value comprises: if the actual processing strength is smaller than the expected processing strength, the flow rate of HT working steam or the water content of the inlet material is increased, so that the temperature of the cylinder wall is increased; and if the actual processing strength is greater than the expected processing strength, reducing the temperature of the cylinder wall by reducing the HT working steam flow or the water content of the inlet material.
As shown in fig. 1, the method further comprises:
s6, setting a first outlet material water content target value for drying equipment, and establishing a PID control model of hot air speed or moisture-removing negative pressure of a roller and the outlet material water content so as to adjust the hot air speed or the moisture-removing negative pressure along with the first outlet material water content target value; and/or setting a second outlet material water content target value for the humidifying equipment, and establishing a PID control model of the water adding amount and the outlet material water content so as to adjust the water adding amount along with the second outlet material water content target value.
Further, the making the hot wind speed or the moisture-removing negative pressure follow the target value of the water content of the outlet material to adjust comprises:
and S61, acquiring a measured value of the moisture content of the first outlet material of the roller of the drying equipment, and obtaining a target deviation value of the moisture content of the first outlet material according to the target value of the moisture content of the first outlet material and the measured value of the moisture content of the first outlet material.
And S62, controlling the hot air speed or the moisture removal negative pressure by the PID control model according to the target deviation value of the water content of the first outlet material, so that the water content of the first outlet material is adjusted according to the target value of the water content of the first outlet material.
The make the water addition volume follow the second export material moisture content target value is adjusted, include:
and S61', acquiring a measured value of the water content of the inlet material of the roller of the humidifying device and a measured value of the water content of the second outlet material, and obtaining a target deviation value of the water content of the second outlet material according to the target value of the water content of the second outlet material and the measured value of the water content of the second outlet material.
And S62', the PID control model controls the water adding amount according to the target deviation value of the water content of the second outlet material and the measured value of the water content of the inlet material, so that the water content of the second outlet material is adjusted according to the target value of the water content of the second outlet material.
Furthermore, the making the hot air wind speed or the moisture-removing negative pressure adjust along with the target value of the water content of the first outlet material further comprises:
and S63, acquiring the water content of the first outlet material, the wind speed of the hot air and the moisture removal negative pressure within set time in real time, and fitting according to a time relation to obtain a first fitting curve of the water content of the first outlet material and the wind speed of the hot air or the moisture removal negative pressure.
And S64, controlling the hot air speed or the moisture removal negative pressure of the drum of the drying equipment according to the first fitting curve.
The messenger add the water yield and follow the second export material moisture content target value is adjusted, still includes:
and S63', acquiring the water content of the inlet material, the water content of the second outlet material and the water adding amount within set time in real time, and fitting according to a time relation to obtain a second fitting curve of the water content of the second outlet material, the water content of the inlet material and the water adding amount.
And S64', controlling the water adding amount of the roller of the humidifying equipment according to the second fitting curve.
In practical application, a small batch test is carried out on another production line by adopting the same processing parameters (except material flow), the same hot air temperature is set for drying equipment, the temperature of the cylinder wall is ensured to be consistent by setting the proper water content of inlet materials and the proper HT working steam flow under the premise of ensuring that the water content of dried cut leaves meets the rolling requirement, meanwhile, the length of each drying section and the retention time of the materials are recorded and measured, and the processing strength G1 is obtained by calculation; setting the same return air temperature for humidifying equipment, recording and measuring the material retention time, and calculating to obtain the processing strength S1;
and judging whether the difference value of the processing strengths of the two production line roller type warming devices is smaller than a set threshold value, if not, adjusting the temperature of the roller wall or the temperature of the hot air and the temperature of the return air to enable the difference value to be smaller than the set threshold value.
For a drying type apparatus:
the processing strength of the roller type warming equipment is controlled by adjusting the HT working steam flow or the water content of the inlet material, and the temperature of the cylinder wall is adjusted by increasing or decreasing the HT working steam flow or the water content of the inlet material, so that the processing strength of the two lines is consistent. If the processing strength of the other production line is smaller than that of the original production line, the flow rate of HT working steam or the water content of the material at the inlet is increased, and the temperature of the cylinder wall is increased; and if the processing strength of the other production line is greater than that of the original production line, reducing the temperature of the cylinder wall by reducing the flow rate of the HT working steam or the water content of the inlet material. In order to well control the moisture content of the outlet material on the premise of ensuring the processing strength, a target value of the moisture content of the outlet material is set, and a PID control model of the hot air speed or the moisture exhaust negative pressure of the roller and the moisture content of the outlet material is established, so that the hot air speed or the moisture exhaust negative pressure is adjusted along with the target value of the moisture content of the outlet material. The specific operation is as follows: acquiring a measured value of the water content of the outlet material of the roller, and acquiring a target deviation value of the water content of the outlet material according to the target value and the measured value; the PID control model controls the hot air speed or the moisture-removing negative pressure according to the target deviation value, so that the water content of the outlet material is adjusted according to the target value; acquiring the water content of the outlet material, the hot air speed and the moisture removal negative pressure within a set time in real time, and fitting according to a time relation to obtain a fitting curve of the water content of the outlet material and the hot air speed or the moisture removal negative pressure; and controlling the hot air wind speed or the moisture removal negative pressure of the roller according to the fitting curve.
For humidification type devices:
if the processing strength of the other production line is smaller than that of the original production line, the return air temperature is increased, so that the processing strengths of the two lines are consistent; if the processing strength of the other production line is greater than that of the original production line, the processing strength of the two lines is consistent by reducing the return air temperature. In order to well control the water content of the outlet material on the premise of ensuring the processing strength, a target value of the water content of the outlet material is set, and a PID control model of the water adding amount and the water content of the outlet material is established so that the water adding amount is adjusted along with the target value of the water content of the outlet material. The specific operation is as follows: acquiring measured values of the water content of inlet and outlet materials of the roller, and acquiring a target deviation value of the water content of the outlet materials according to the target value and the measured values; the PID control model controls the water adding amount according to the target deviation value and the inlet water content, so that the water content of the outlet material is adjusted according to the target value; acquiring the water content and the water adding amount of the inlet and outlet materials within set time in real time, and fitting according to a time relation to obtain a fitting curve of the water content of the outlet materials and the water content and the water adding amount of the inlet; and controlling the water adding amount of the roller according to the fitting curve.
Therefore, the control method for consistency of processing strength of the tobacco roller type warming equipment provided by the embodiment of the invention is characterized in that the expected processing strength of a production line of the expected tobacco roller type warming equipment is set, the wall temperature, the hot air temperature, the return air temperature, the length of each drying section and the material retention time of the tobacco material roller type warming equipment are collected, the actual processing strength of the roller type warming equipment is calculated on the basis of the data, and the processing strength is controlled according to the difference between the actual processing strength and the expected processing strength. The tobacco rolling type temperature increasing device solves the problems that the existing tobacco rolling type temperature increasing devices have large quality difference of tobacco shreds at different processing points and can not realize homogenization processing, and can improve the consistency of the tobacco shred making quality and the consistency level of the cigarette processing quality.
Correspondingly, the invention also provides a control system for the consistency of the processing strength of the tobacco roller type warming equipment, which comprises the following components: a first setting unit for setting a desired processing intensity of a drying apparatus and/or a moistening apparatus of a tobacco drum drying line. The first acquisition unit is used for acquiring the cylinder wall temperature, the hot air temperature, the length of each drying section and the residence time of the first material of the drying equipment, and/or the return air temperature and the residence time of the second material of the humidifying equipment. A calculation unit for calculating according to a formula
Calculating to obtain the actual processing strength of the drying equipment, wherein G represents the processing strength, and B represents the processing strength 1 Indicating the temperature of zone 1 of the drum wall, B 2 Indicating the temperature, L, of the zone 2 of the drum wall 1 Represents the length of the drying section in zone 1 of the drum, L 2 The length of the drying section in the drum 2 area is shown, L is the total length of the drum drying equipment, R is the temperature of hot air, T 1 Representing the residence time of the material in the drum of the drying apparatus, and/or according to the formula S = H + lnT 2 Calculating the actual processing strength of the humidifying equipment, wherein S represents the processing strength, H represents the return air temperature, and T represents the actual processing strength 2 Indicating the residence time of the material in the drum of the moistening device. And the first control unit is used for judging whether the difference value between the actual processing intensity of the drying equipment and/or the humidifying equipment and the corresponding expected processing intensity is smaller than a set threshold value, and if not, adjusting the barrel wall temperature and/or the hot air temperature and/or the return air temperature to enable the difference value to be smaller than the set threshold value.
The system further comprises: the second control unit is used for controlling the processing strength of the drying equipment by adjusting the HT working steam flow or the water content of the inlet material, adjusting the temperature of the cylinder wall by increasing or decreasing the HT working steam flow or the water content of the inlet material, and/or controlling the processing strength of the humidifying equipment by adjusting the return air temperature.
The system further comprises: the PID control unit is used for setting a first outlet material moisture content target value for the drying equipment, and establishing a PID control model of the hot air speed or the moisture-removing negative pressure of the roller and the outlet material moisture content so as to adjust the hot air speed or the moisture-removing negative pressure along with the first outlet material moisture content target value; and/or setting a second outlet material water content target value for the humidifying equipment, and establishing a PID control model of the water adding amount and the outlet material water content so as to adjust the water adding amount along with the second outlet material water content target value.
Further, the PID control unit includes:
the deviation value adjusting unit is used for acquiring a measured value of the water content of the first outlet material of the roller of the drying equipment and obtaining a target deviation value of the water content of the first outlet material according to the target value of the water content of the first outlet material and the measured value of the water content of the first outlet material; the PID control model controls the hot air speed or the moisture discharge negative pressure according to the target deviation value of the water content of the first outlet material, so that the water content of the first outlet material is adjusted according to the target value of the water content of the first outlet material, and/or the PID control model is used for obtaining an actual measurement value of the water content of an inlet material and an actual measurement value of the water content of a second outlet material of a roller of the humidifying equipment, and obtaining a target deviation value of the water content of the second outlet material according to the target value of the water content of the second outlet material and the actual measurement value of the water content of the second outlet material; and the PID control model controls the water adding amount according to the target deviation value of the water content of the second outlet material and the measured value of the water content of the inlet material, so that the water content of the second outlet material is adjusted according to the target value of the water content of the second outlet material. The fitting curve adjusting unit is used for acquiring the water content of the first outlet material, the hot air speed and the moisture removal negative pressure within a set time in real time, and fitting according to a time relation to obtain a first fitting curve of the water content of the first outlet material and the hot air speed or the moisture removal negative pressure; and/or acquiring the water content of the inlet material, the water content of the second outlet material and the water adding amount within set time in real time, and fitting according to the time relationship to obtain a second fitting curve of the water content of the second outlet material, the water content of the inlet material and the water adding amount. The fitting curve adjusting unit is also used for controlling the hot air speed or the moisture removal negative pressure of the drum of the drying equipment according to the first fitting curve and/or controlling the water adding amount of the drum of the humidifying equipment according to the second fitting curve.
According to the control system for the consistency of the processing strength of the tobacco roller type warming equipment, provided by the embodiment of the invention, the expected processing strength of a production line of the expected tobacco roller type warming equipment is set, the barrel wall temperature, the hot air temperature, the return air temperature, the length of each drying section and the material retention time of the tobacco material roller type warming equipment are acquired, the actual processing strength of the roller type warming equipment is calculated on the basis of the data, and the processing strength is controlled according to the difference value between the actual processing strength and the expected processing strength. The tobacco rolling type temperature increasing device solves the problems that the existing tobacco rolling type temperature increasing devices have large quality difference of tobacco shreds at different processing points and can not realize homogenization processing, and can improve the consistency of the tobacco shred making quality and the consistency level of the cigarette processing quality.
Thus far, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (10)
1. A control method for processing strength consistency of tobacco roller type warming equipment is characterized by comprising the following steps:
setting the expected processing strength of drying equipment and humidifying equipment of a tobacco roller drying production line;
acquiring the cylinder wall temperature, the hot air temperature, the length of each drying section and the residence time of a first material of drying equipment, and the return air temperature and the residence time of a second material of humidifying equipment;
according to the formula
Calculating to obtain the actual processing strength of the drying equipment, wherein G represents the processing strength, and B represents the processing strength 1 Indicating the temperature of zone 1 of the drum wall, B 2 Indicating the temperature, L, of zone 2 of the drum wall 1 Denotes the length of the drying zone of the drum 1, L 2 Showing the length of the drying section in the area of the roller 2, L showing the total length of the roller drying equipment, R showing the temperature of hot air and T 1 Representing the residence time of the material in the drum of the drying apparatus and according to the formula S = H + lnT 2 Calculating the actual processing intensity of the humidifying equipment, wherein S represents the processing intensity, H represents the return air temperature, and T represents the return air temperature 2 Representing the residence time of the material in the drum of the humidifying equipment;
and judging whether the difference value between the actual processing strength of the drying equipment and the expected processing strength of the humidifying equipment and the corresponding expected processing strength is smaller than a set threshold value, and if not, adjusting the barrel wall temperature and/or the hot air temperature and/or the return air temperature to enable the difference value to be smaller than the set threshold value.
2. The method for controlling consistency of processing strength of tobacco roller type warming equipment according to claim 1, further comprising:
the processing strength of the drying equipment is controlled by adjusting the HT working steam flow or the water content of the inlet material, the temperature of the cylinder wall is adjusted by increasing or decreasing the HT working steam flow or the water content of the inlet material, and the processing strength of the humidifying equipment is controlled by adjusting the return air temperature.
3. The method for controlling consistency of processing strength of tobacco roller type warming equipment according to claim 2, wherein the step of adjusting the wall temperature and/or the hot air temperature and/or the return air temperature so that the difference is smaller than the set threshold value comprises the steps of:
for the drying equipment, if the actual processing strength is smaller than the expected processing strength, the temperature of the cylinder wall is increased by increasing the flow rate of HT working steam or the water content of the inlet material; if the actual processing strength of the drying equipment is greater than the expected processing strength, reducing the temperature of the cylinder wall by reducing the flow rate of the HT working steam or the water content of the inlet material;
for a humidifier apparatus, if the actual process strength is less than the expected process strength, increasing the actual process strength by increasing the return air temperature; if the actual process strength of the humidification apparatus is greater than the expected process strength, the actual process strength is reduced by reducing the return air temperature.
4. The method for controlling consistency of processing strength of tobacco roller type warming equipment according to claim 3, further comprising:
setting a first outlet material water content target value for drying equipment, and establishing a PID control model of hot air speed or moisture-removing negative pressure of a roller and the water content of an outlet material, so that the hot air speed or the moisture-removing negative pressure is adjusted along with the first outlet material water content target value;
and for the humidifying equipment, setting a second outlet material water content target value, and establishing a PID control model of the water addition and the outlet material water content so as to adjust the water addition according to the second outlet material water content target value.
5. The method for controlling consistency of processing strength of tobacco roller type warming equipment according to claim 4, wherein the adjusting of the hot air speed or the moisture-removing negative pressure along with the target value of the moisture content of the first outlet material comprises:
acquiring a measured value of the water content of a first outlet material of a roller of drying equipment, and obtaining a target deviation value of the water content of the first outlet material according to the target value of the water content of the first outlet material and the measured value of the water content of the first outlet material;
the PID control model controls the hot air speed or the moisture-removing negative pressure according to the target deviation value of the first outlet material moisture content, so that the first outlet material moisture content is adjusted according to the target value of the first outlet material moisture content,
the make the water addition volume follow the second export material moisture content target value is adjusted, include:
acquiring a measured value of the water content of an inlet material and a measured value of the water content of a second outlet material of a roller of a humidifying device, and acquiring a target deviation value of the water content of the second outlet material according to the target value of the water content of the second outlet material and the measured value of the water content of the second outlet material;
and the PID control model controls the water adding amount according to the target deviation value of the second outlet material water content and the actual measurement value of the inlet material water content, so that the second outlet material water content is adjusted according to the second outlet material water content target value.
6. The method for controlling consistency of processing strength of tobacco roller type warming equipment according to claim 5, wherein the adjusting of the wind speed or the moisture-removing negative pressure of the hot wind along with the target value of the moisture content of the first outlet material further comprises:
acquiring the water content of the first outlet material, the wind speed of the hot air and the moisture-removing negative pressure in a set time in real time, and fitting according to a time relation to obtain a first fitting curve of the water content of the first outlet material and the wind speed of the hot air or the moisture-removing negative pressure;
controlling the hot air wind speed or the moisture removal negative pressure of a roller of the drying equipment according to the first fitting curve,
the messenger add the water yield and follow the second export material moisture content target value is adjusted, still includes:
acquiring the water content of the inlet material, the water content of the second outlet material and the water adding amount within set time in real time, and fitting according to a time relation to obtain a second fitting curve of the water content of the second outlet material, the water content of the inlet material and the water adding amount;
controlling the water addition amount of a roller of a humidifying device according to the second fitting curve.
7. A control system for processing strength consistency of tobacco roller warming equipment is characterized by comprising the following components:
a first setting unit for setting the expected processing strength of the drying equipment and the humidifying equipment of the tobacco roller drying production line;
the first acquisition unit is used for acquiring the cylinder wall temperature, the hot air temperature, the length of each drying section and the residence time of a first material of the drying equipment, and the return air temperature and the residence time of a second material of the humidifying equipment;
a calculation unit for calculating according to a formula
Calculating to obtain the actual processing strength of the drying equipment, wherein G represents the processing strength, and B represents the processing strength 1 Indicating the temperature of zone 1 of the drum wall, B 2 Indicating the temperature, L, of zone 2 of the drum wall 1 Denotes the length of the drying zone of the drum 1, L 2 Showing the length of the drying section in the area of the roller 2, L showing the total length of the roller drying equipment, R showing the temperature of hot air and T 1 Representing the residence time of the material in the drum of the drying apparatus and according to the formula S = H + lnT 2 Calculating the actual processing strength of the humidifying equipment, wherein S represents the processing strength, H represents the return air temperature, and T represents the actual processing strength 2 Representing the residence time of the material in the drum of the humidifying equipment;
and the first control unit is used for judging whether the difference value between the actual processing intensity of the drying equipment and the humidifying equipment and the corresponding expected processing intensity is smaller than a set threshold value, and if not, adjusting the barrel wall temperature and/or the hot air temperature and/or the return air temperature to enable the difference value to be smaller than the set threshold value.
8. The system for controlling consistency of processing strength of tobacco roller type warming equipment according to claim 7, further comprising:
the second control unit is used for controlling the processing strength of the drying equipment by adjusting the HT working steam flow or the water content of the inlet material, adjusting the temperature of the cylinder wall by increasing or decreasing the HT working steam flow or the water content of the inlet material, and controlling the processing strength of the humidifying equipment by adjusting the return air temperature.
9. The system for controlling consistency of processing strength of tobacco roller type warming equipment according to claim 8, further comprising:
the PID control unit is used for setting a first outlet material water content target value for the drying equipment, and establishing a PID control model of the hot air speed or the moisture-removing negative pressure of the roller and the outlet material water content so as to adjust the hot air speed or the moisture-removing negative pressure along with the first outlet material water content target value; and for the humidifying equipment, setting a second outlet material water content target value, and establishing a PID control model of the water addition and the outlet material water content so as to adjust the water addition according to the second outlet material water content target value.
10. The system for controlling consistency of processing strength of tobacco roller type warming equipment according to claim 9, wherein the PID control unit comprises:
the deviation value adjusting unit is used for acquiring a measured value of the water content of a first outlet material of a drum of the drying equipment and obtaining a target deviation value of the water content of the first outlet material according to the target value of the water content of the first outlet material and the measured value of the water content of the first outlet material; the PID control model is used for controlling the hot air speed or the moisture discharge negative pressure according to the target deviation value of the water content of the first outlet material, so that the water content of the first outlet material is adjusted according to the target value of the water content of the first outlet material, and is also used for obtaining an actual measurement value of the water content of an inlet material and an actual measurement value of the water content of a second outlet material of a roller of the humidifying equipment, and obtaining a target deviation value of the water content of the second outlet material according to the target value of the water content of the second outlet material and the actual measurement value of the water content of the second outlet material; the PID control model controls the water adding amount according to the target deviation value of the water content of the second outlet material and the measured value of the water content of the inlet material, so that the water content of the second outlet material is adjusted according to the target value of the water content of the second outlet material;
the fitting curve adjusting unit is used for acquiring the water content of the first outlet material, the wind speed of the hot air and the moisture-removing negative pressure in a set time in real time, and fitting according to a time relation to obtain a first fitting curve of the water content of the first outlet material and the wind speed of the hot air or the moisture-removing negative pressure; acquiring the water content of the inlet material, the water content of the second outlet material and the water adding amount within set time in real time, and fitting according to a time relation to obtain a second fitting curve of the water content of the second outlet material, the water content of the inlet material and the water adding amount;
the fitting curve adjusting unit is also used for controlling the hot air wind speed or the moisture removal negative pressure of the drum of the drying equipment according to the first fitting curve and controlling the water adding amount of the drum of the humidifying equipment according to the second fitting curve.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4306358A (en) * | 1979-08-15 | 1981-12-22 | Amf Incorporated | Air drying apparatus |
| CN106690391B (en) * | 2017-03-28 | 2017-11-17 | 中国烟草总公司郑州烟草研究院 | A kind of method of regulation and control tobacco drum drying in product multiple spot processing strength consistency |
| CN108771281A (en) * | 2018-08-24 | 2018-11-09 | 山东中烟工业有限责任公司 | It is a kind of to reduce the method and system fluctuated between drum-type cut-tobacco drier barrel temperature batch |
| CN110286660B (en) * | 2019-06-17 | 2021-05-14 | 云南中烟工业有限责任公司 | Method for regulating and controlling processing strength of cut tobacco in drying process based on temperature rise process of cut tobacco |
| CN110301664B (en) * | 2019-07-17 | 2022-04-19 | 安徽中烟工业有限责任公司 | Quantitative characterization method for processing strength of tobacco primary processing line |
| 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 |
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