CN113349409B - Tobacco leaf temperature and humidity control device and method - Google Patents
Tobacco leaf temperature and humidity control device and method Download PDFInfo
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- CN113349409B CN113349409B CN202110677476.9A CN202110677476A CN113349409B CN 113349409 B CN113349409 B CN 113349409B CN 202110677476 A CN202110677476 A CN 202110677476A CN 113349409 B CN113349409 B CN 113349409B
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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 relates to a tobacco leaf temperature and humidity control device and a method, wherein the tobacco leaf temperature and humidity control device comprises a roller (1), a detection device and an adjusting device, wherein the roller (1) is provided with an inlet and an outlet and is configured to drive tobacco leaves to turn over and convey the tobacco leaves from the inlet to the outlet; the detection device is used for detecting the return air temperature of the roller (1) and the moisture content of the outlet of the tobacco leaves; the adjusting device is used for adjusting the moisture content of the outlet of the tobacco leaves and enabling the moisture content to reach or approach the first preset moisture content infinitely on the premise that the return air temperature is kept within the first preset range, the first preset range is a preset target control range of the return air temperature of the roller (1), and the first preset moisture content is a target value of the moisture content of the outlet of the tobacco leaves. The invention can simultaneously control the return air temperature and the outlet moisture content, can realize the control of the moisture content on the premise of ensuring the tobacco leaf warming effect, and improves the control level in the tobacco leaf production process.
Description
Technical Field
The invention relates to the technical field of tobacco processing, in particular to a tobacco leaf temperature and humidity control device and method.
Background
In the tobacco processing process, the return air temperature of tobacco leaves needs to be monitored so as to control the heating temperature in the roller and heat the tobacco in the roller.
At present, the temperature control method adopted in the related art is performed in stages: in the preheating stage, the opening degree of a valve of the heating device is controlled to ensure that the return air temperature meets the requirement of a set value; during the production phase, the return air temperature is maintained by adjusting the opening of the valve for inputting hot steam. Thus, although the purpose of warming the leaves can be well achieved, the moisture content of the tobacco leaves is difficult to meet the requirement.
It is noted that the information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a tobacco leaf temperature and humidity control device and method, which can control the temperature and humidity of tobacco leaves simultaneously.
According to one aspect of the present invention, there is provided a tobacco leaf temperature and humidity control device, comprising:
a drum provided with an inlet and an outlet and configured to drive the tobacco leaves to turn over and convey the tobacco leaves from the inlet to the outlet;
the detection device is used for detecting the return air temperature of the roller and the outlet moisture content of the tobacco leaves; and
and the adjusting device is used for adjusting the outlet moisture content of the tobacco leaves and enabling the outlet moisture content to reach or approach the first preset moisture content infinitely on the premise that the return air temperature is kept within the first preset range, the first preset range is a preset target control range of the return air temperature of the roller, and the first preset moisture content is a target value of the outlet moisture content of the tobacco leaves.
In some embodiments, the adjustment device comprises:
the heating device is arranged at the inlet of the roller and is used for heating the airflow entering the roller;
the first control valve is used for controlling the heating temperature of the heating device;
the first conveying pipe is arranged at an inlet of the roller and is used for introducing steam into the roller;
the second control valve is used for adjusting the flow of the first delivery pipe; and
and the control device is in signal connection with the first control valve and the second control valve and is configured to keep the return air temperature within a first preset range by adjusting the opening degrees of the first control valve and the second control valve, and the moisture content of the outlet of the tobacco leaves reaches or is infinitely close to the first preset moisture content.
In some embodiments, the control device is configured to: when the moisture content of the outlet of the tobacco leaves is higher than a first preset moisture content, and the return air temperature of the roller is higher than the lower limit value of a first preset range, reducing the opening degree of a second control valve; when the moisture content of the outlet of the tobacco leaves is higher than a first preset moisture content, and the return air temperature of the roller is lower than the lower limit value of a first preset range, increasing the opening degree of a first control valve; when the opening degree of the first control valve is adjusted to be maximum and the return air temperature of the roller is still lower than the lower limit value of the first preset range, the opening degree of the second control valve is increased so that the return air temperature of the roller is at least higher than the lower limit value of the first preset range.
In some embodiments, the control device is configured to: when the moisture content of the outlet of the tobacco leaves is lower than a first preset moisture content and the return air temperature of the roller is lower than the upper limit value of a first preset range, increasing the opening degree of a second control valve; when the moisture content of the outlet of the tobacco leaves is lower than a first preset moisture content and the return air temperature of the roller is higher than the upper limit value of a first preset range, reducing the opening degree of a first control valve; when the opening degree of the first control valve is adjusted to be minimum and the return air temperature of the roller is still higher than the upper limit value of the first preset range, the opening degree of the second control valve is reduced so that the return air temperature of the roller is at least lower than the upper limit value of the first preset range.
In some embodiments, the heating means comprises a heat exchanger and a second duct for conveying a hot gas into the heat exchanger, the hot gas having a temperature greater than the temperature of the gas flow at the inlet of the drum.
In some embodiments, the tobacco leaf temperature and humidity control device further comprises a fan and a third conveying pipe, the fan is arranged at the outlet of the roller, and the third conveying pipe is communicated with the fan and the inlet of the roller.
According to another aspect of the present invention, there is provided a method for controlling temperature and humidity of tobacco leaves, comprising:
setting a target control range of the return air temperature of the roller as a first preset range, and setting a target value of the moisture content of the outlet of the tobacco leaves as a first preset moisture content, wherein the roller is provided with an inlet and an outlet and is used for driving the tobacco leaves to turn over and conveying the tobacco leaves from the inlet to the outlet;
detecting the return air temperature of the roller and the moisture content of the outlet of the tobacco leaves; and
on the premise that the return air temperature is kept within a first preset range, the moisture content of the outlet of the tobacco leaves is adjusted and is made to reach or approach the first preset moisture content infinitely.
In some embodiments, the operation of adjusting the outlet moisture content of the tobacco leaves to or infinitely near the first predetermined moisture content, provided that the return air temperature is maintained within a first predetermined range, comprises:
the inlet of the roller is provided with a heating device, the heating device is used for heating airflow entering the roller, and the heating device is provided with a first control valve used for controlling the heating temperature;
the inlet of the roller is communicated with a first conveying pipe, the first conveying pipe is used for introducing steam into the roller, and a second control valve used for adjusting the flow is arranged on the first conveying pipe; and
through adjusting the aperture of first control valve and second control valve, make return air temperature keep in first preset within range, and the export moisture content of tobacco leaf reaches or infinitely approaches first preset moisture content.
In some embodiments, the operation of adjusting the opening degrees of the first control valve and the second control valve includes:
when the moisture content of the outlet of the tobacco leaves is higher than a first preset moisture content, and the return air temperature of the roller is higher than the lower limit value of a first preset range, reducing the opening degree of a second control valve; when the moisture content of the outlet of the tobacco leaves is higher than a first preset moisture content, and the return air temperature of the roller is lower than the lower limit value of a first preset range, increasing the opening degree of a first control valve; when the opening degree of the first control valve is adjusted to be maximum and the return air temperature of the roller is still lower than the lower limit value of the first preset range, the opening degree of the second control valve is increased so that the return air temperature of the roller is at least higher than the lower limit value of the first preset range.
In some embodiments, the operation of adjusting the opening degrees of the first control valve and the second control valve includes:
when the moisture content of the outlet of the tobacco leaves is lower than a first preset moisture content and the return air temperature of the roller is lower than the upper limit value of a first preset range, increasing the opening degree of a second control valve; when the moisture content of the outlet of the tobacco leaves is lower than a first preset moisture content and the return air temperature of the roller is higher than the upper limit value of a first preset range, reducing the opening degree of a first control valve; when the opening degree of the first control valve is adjusted to be minimum and the return air temperature of the roller is still higher than the upper limit value of the first preset range, the opening degree of the second control valve is reduced so that the return air temperature of the roller is at least lower than the upper limit value of the first preset range.
Based on the technical scheme, the adjusting device in the embodiment of the invention can control the return air temperature and the outlet moisture content at the same time, and can realize the control of the moisture content and improve the control level in the tobacco production process on the premise of ensuring the tobacco warming effect; moreover, when the return air temperature and the moisture content of the tobacco leaves at the outlet are adjusted, the moisture content of the outlet is adjusted on the premise that the return air temperature is kept within a first preset range, and compared with the technical scheme that the moisture content of the outlet is adjusted on the premise that the return air temperature is controlled at a specific preset value, the moisture content of the actual outlet can be more efficiently and accurately adjusted to the first preset moisture content, so that the moisture content of the tobacco leaves is controlled at a preset level, the humidity of the tobacco leaves is ensured to meet the production requirement, and the quality of the tobacco leaves is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic structural view of an embodiment of the tobacco leaf temperature and humidity control device of the present invention.
Fig. 2 is a schematic diagram of an embodiment of the tobacco leaf temperature and humidity control device of the invention.
FIG. 3 is a flow chart of an embodiment of the tobacco temperature and humidity control device of the present invention.
In the figure:
1. a drum; 2. a heating device; 21. a heat exchanger; 22. a second delivery pipe; 3. a first control valve; 4. a first delivery pipe; 5. a second control valve; 6. a fan; 7. a third delivery pipe; 8. and (4) a filter screen.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the scope of the invention.
As shown in fig. 1, in some embodiments of the present invention, the device includes a roller 1, a detecting device and an adjusting device, the roller 1 is provided with an inlet and an outlet, the roller 1 is configured to turn the tobacco leaves and convey the tobacco leaves from the inlet to the outlet, the detecting device is configured to detect the return air temperature of the roller 1 and the outlet moisture content of the tobacco leaves, the adjusting device is configured to adjust the outlet moisture content of the tobacco leaves to reach or infinitely approach a first preset moisture content on the premise that the return air temperature is kept within a first preset range, the first preset range is a preset target control range of the return air temperature of the roller 1, and the first preset moisture content is a target value of the outlet moisture content of the tobacco leaves.
The roller 1 rotates around the rotation axis thereof during operation, and tobacco leaves are turned over during the rotation process to be loosened and adjusted in temperature and humidity. The roller 1 can also convey the tobacco leaves from the inlet to the outlet, so that the tobacco leaves can be treated uninterruptedly.
The detection device is used for detecting the actual return air temperature of the roller 1 and the actual outlet moisture content of the tobacco leaves in real time. The adjustment means may adjust the actual return air temperature of the drum 1 to be within a first preset range, i.e. the value of the actual return air temperature is contained within the first preset range. The first predetermined range is a numerical range including an upper limit value and a lower limit value, the upper limit value being greater than the lower limit value. The adjusting device can also adjust the actual outlet moisture content of the tobacco leaves to a first preset moisture content or be infinitely close to the first moisture content, and meanwhile, the actual return air temperature is also controlled within a first preset range.
In the embodiment, the adjusting device can control the return air temperature and the water content of the outlet at the same time, and can realize the control of the water content and improve the control level in the tobacco production process on the premise of ensuring the tobacco warming effect; moreover, when the return air temperature and the moisture content of the tobacco leaves at the outlet are adjusted, the moisture content of the outlet is adjusted on the premise that the return air temperature is kept within a first preset range, and compared with the technical scheme that the moisture content of the outlet is adjusted on the premise that the return air temperature is controlled at a specific preset value, the moisture content of the actual outlet can be more efficiently and accurately adjusted to the first preset moisture content, so that the moisture content of the tobacco leaves is controlled at a preset level, the humidity of the tobacco leaves is ensured to meet the production requirement, and the quality of the tobacco leaves is improved.
The detection means may include a temperature detector for detecting the temperature of the return air and a moisture detector for detecting the moisture content. The temperature detector may be a thermometer, a temperature sensor, or the like.
In some embodiments, the regulating means comprise a heating device 2, a first control valve 3, a first delivery pipe 4, a second control valve 5 and control means.
A heating device 2 is provided at the inlet of the drum 1, the heating device 2 being used to heat the air flow entering the drum 1. The heating device 2 realizes the heating function of the tobacco leaves by heating the airflow entering the roller 1. The air flow which is about to enter the roller 1 is heated by the heating device 2 and then enters the roller 1, the tobacco leaves are heated in the circulation process in the roller 1, the moisture content of the heated tobacco leaves is reduced, and therefore the heating device 2 has the functions of heating and dehumidifying the tobacco leaves.
The first control valve 3 is used to control the heating temperature of the heating device 2. By increasing the opening degree of the first control valve 3, the heating temperature of the heating device 2 can be increased, so that the temperature of the air flow entering the roller 1 is higher; by reducing the opening degree of the first control valve 3, the heating temperature of the heating device 2 can be reduced, and the temperature of the air flow entering the drum 1 can be reduced.
The first delivery pipe 4 is arranged at an inlet of the drum 1, and the first delivery pipe 4 is used for introducing steam into the drum 1. The outlet of the first duct 4 is located at the inlet of the drum 1. The humidity of the tobacco leaves in the roller 1 can be adjusted by introducing steam into the roller 1, so that the aim of adjusting the moisture content of the tobacco leaves is fulfilled. The steam is generally high-temperature steam, and the temperature of the steam is higher than that of the air flow in the drum 1, so that the steam input by the first conveying pipe 4 has the functions of heating and humidifying the tobacco leaves.
The second control valve 5 is used to regulate the flow of the first delivery pipe 4. The flow of the first conveying pipe 4 can be increased by increasing the opening degree of the second control valve 5, so that the humidity of the tobacco leaves is increased, and the actual moisture content of the tobacco leaves at the outlet is improved; by reducing the opening of the second control valve 5, the flow of the first delivery pipe 4 can be reduced, thereby reducing the humidity of the tobacco leaves and reducing the actual moisture content of the tobacco leaves at the outlet.
The control device is in signal connection with the first control valve 3 and the second control valve 5, and the control device is configured to keep the return air temperature within a first preset range by adjusting the opening degrees of the first control valve 3 and the second control valve 5, and the moisture content of the outlet of the tobacco leaves reaches or is infinitely close to the first preset moisture content.
As shown in fig. 2 and 3, in some embodiments, the control device is configured to: when the moisture content of the outlet of the tobacco leaves is higher than a first preset moisture content and the return air temperature of the roller 1 is higher than the lower limit value of a first preset range, reducing the opening degree of the second control valve 5; when the moisture content of the outlet of the tobacco leaves is higher than a first preset moisture content and the return air temperature of the roller 1 is lower than the lower limit value of a first preset range, the opening degree of the first control valve 3 is increased; when the opening degree of the first control valve 3 is adjusted to the maximum and the return air temperature of the drum 1 is still lower than the lower limit value of the first preset range, the opening degree of the second control valve 5 is increased so that the return air temperature of the drum 1 is at least higher than the lower limit value of the first preset range.
In some embodiments, the control device is configured to: when the moisture content of the outlet of the tobacco leaves is lower than the first preset moisture content and the return air temperature of the roller 1 is lower than the upper limit value of the first preset range, the opening degree of the second control valve 5 is increased; when the moisture content of the outlet of the tobacco leaves is lower than a first preset moisture content and the return air temperature of the roller 1 is higher than the upper limit value of a first preset range, reducing the opening degree of the first control valve 3; when the opening degree of the first control valve 3 is adjusted to be minimum and the return air temperature of the drum 1 is still higher than the upper limit value of the first preset range, the opening degree of the second control valve 5 is reduced so that the return air temperature of the drum 1 is at least lower than the upper limit value of the first preset range.
In some embodiments, the heating means 2 comprise a heat exchanger 21 and a second duct 22, the second duct 22 being intended to convey hot gases inside the heat exchanger 21, the hot gases having a temperature greater than the temperature of the air flow at the inlet of the drum 1.
In the above embodiment, the heating device 2 realizes the heating effect on the air flow through a heat exchange mode, for example, steam conveyed by the first conveying pipe 4 can be used as a heat exchange source of the heat exchanger, the same hot air source is used for the heating device 2 and the first conveying pipe 4, two heat sources do not need to be specially arranged, the cost is saved, and the structure is simplified.
Of course, in other embodiments, the airflow may be heated by other means, such as electrical heating.
In some embodiments, the tobacco temperature and humidity control device further comprises a fan 6 and a third delivery pipe 7, the fan 6 is disposed at the outlet of the roller 1, and the third delivery pipe 7 communicates the fan 6 and the inlet of the roller 1. Through setting up fan 6 and third conveyer pipe 7, can make the higher return air of temperature that flows out from the export of cylinder 1 flow back to cylinder 1 through the entry of cylinder 1 again in, realize recycling of return air, be favorable to the energy saving, avoid the energy extravagant.
In some embodiments, the tobacco leaf temperature and humidity control device further comprises a filter screen 8, and the filter screen 8 is arranged at the outlet of the drum 1 and is located at the upstream of the fan 6. The filter screen 8 can filter return air to prevent tobacco fragments or other impurities from entering the fan 6 and affecting the service life of the fan 6; the air flow recycled into the roller 1 through the third conveying pipe 7 can be purified, and tobacco fragments or other impurities are prevented from entering the roller 1 to influence the quality of the tobacco.
The invention also provides a tobacco leaf temperature and humidity control method, which comprises the following steps:
setting a target control range of the return air temperature of the roller 1 as a first preset range, and setting a target value of the moisture content of the outlet of the tobacco leaves as a first preset moisture content, wherein the roller 1 is provided with an inlet and an outlet, and the roller 1 is used for driving the tobacco leaves to turn over and conveying the tobacco leaves from the inlet to the outlet;
detecting the return air temperature of the roller 1 and the outlet moisture content of the tobacco leaves; and
on the premise that the return air temperature is kept within a first preset range, the moisture content of the outlet of the tobacco leaves is adjusted and is made to reach or approach the first preset moisture content infinitely.
In some embodiments, the operation of adjusting the outlet moisture content of the tobacco leaves to or infinitely close to the first predetermined moisture content, provided that the return air temperature is maintained within a first predetermined range, comprises:
a heating device 2 is arranged at an inlet of the roller 1, the heating device 2 is used for heating airflow entering the roller 1, and the heating device 2 is provided with a first control valve 3 for controlling the heating temperature;
a first conveying pipe 4 is communicated with an inlet of the roller 1, the first conveying pipe 4 is used for introducing steam into the roller 1, and a second control valve 5 used for adjusting the flow is arranged on the first conveying pipe 4; and
the return air temperature is kept within a first preset range by adjusting the opening degree of the first control valve 3 and the opening degree of the second control valve 5, and the moisture content of the outlet of the tobacco leaves reaches or is infinitely close to the first preset moisture content.
In some embodiments, the operation of adjusting the opening degrees of the first control valve 3 and the second control valve 5 includes:
when the moisture content of the outlet of the tobacco leaves is higher than a first preset moisture content and the return air temperature of the roller 1 is higher than the lower limit value of a first preset range, reducing the opening degree of the second control valve 5; when the moisture content of the outlet of the tobacco leaves is higher than a first preset moisture content and the return air temperature of the roller 1 is lower than the lower limit value of a first preset range, the opening degree of the first control valve 3 is increased; when the opening degree of the first control valve 3 is adjusted to the maximum and the return air temperature of the drum 1 is still lower than the lower limit value of the first preset range, the opening degree of the second control valve 5 is increased so that the return air temperature of the drum 1 is at least higher than the lower limit value of the first preset range.
In some embodiments, the operation of adjusting the opening degrees of the first control valve 3 and the second control valve 5 includes:
when the moisture content of the outlet of the tobacco leaves is lower than the first preset moisture content and the return air temperature of the roller 1 is lower than the upper limit value of the first preset range, the opening degree of the second control valve 5 is increased; when the moisture content of the outlet of the tobacco leaves is lower than a first preset moisture content and the return air temperature of the roller 1 is higher than the upper limit value of a first preset range, reducing the opening degree of the first control valve 3; when the opening degree of the first control valve 3 is adjusted to be minimum and the return air temperature of the drum 1 is still higher than the upper limit value of the first preset range, the opening degree of the second control valve 5 is reduced so that the return air temperature of the drum 1 is at least lower than the upper limit value of the first preset range.
The following describes an operation procedure of an embodiment of the tobacco leaf temperature and humidity control device of the present invention:
firstly, installing a moisture detector at an outlet of a roller 1 to detect the moisture content of the outlet;
then, setting a first preset range of proper return air temperature according to the type and the state of the tobacco leaves to be processed;
then, setting the first outlet moisture content of the tobacco leaves according to the processing requirements of the subsequent procedures;
finally, on the premise that the return air temperature is controlled within a first preset range, the opening degrees of the first control valve 3 and the second control valve 5 are adjusted according to the deviation between the actual outlet moisture content of the tobacco leaves and the preset first outlet moisture content by utilizing the characteristics that the steam is introduced through the first conveying pipe 4 to increase the temperature and humidify and the hot air is heated through the heating device 2 to increase the temperature and dehumidify, so that the outlet moisture content reaches or is infinitely close to the first outlet moisture content.
The embodiment of the invention designs a temperature-increasing control method with the function of adjusting the moisture content of the tobacco leaves by utilizing the characteristics that steam is introduced through the first conveying pipe 4 to increase the temperature and humidify and hot air is heated through the heating device 2 to increase the temperature and dehumidify, the control of the temperature-increasing return air of the blades is changed from the control of a certain specific set value in the prior art to the control of a certain numerical range, the function of finely adjusting the moisture content of the outlet of the blades is added on the premise of ensuring the temperature-increasing effect of the blades, the function of equipment is widened, the control level of the production process of the cut tobacco is improved, and the processing requirements of the subsequent procedures are effectively met.
The specific embodiment is as follows:
the production capacity of certain equipment in a cigarette factory is 3000kg/h, the process requires that the return air temperature range is 40-50 ℃, and the water content of an outlet is 19.2 +/-0.5%.
In the production process, when the moisture content of the tobacco leaves at the outlet is higher than the set central value by 19.2 percent and the return air temperature is higher than the lower limit value by 40 ℃, reducing the opening degree of the second control valve 5, reducing the application amount of steam and adjusting the moisture content of the tobacco leaves at the outlet; when the return air temperature is lower than the lower limit value of 40 ℃, the opening degree of the first control valve 3 is increased, and when the opening degree of the first control valve 3 is opened to the maximum but the return air temperature is still lower than the lower limit value of 40 ℃, the opening degree of the second control valve 5 is increased so that the return air temperature meets the requirement of the lower limit value of 40 ℃.
When the moisture content of the tobacco leaves at the outlet is lower than the set central value by 19.2 percent and the return air temperature is lower than the upper limit value by 50 ℃, increasing the opening degree of the second control valve 5, increasing the application amount of steam and adjusting the moisture content of the tobacco leaves at the outlet; when the return air temperature is higher than the upper limit value of 50 ℃, the opening degree of the first control valve 3 is reduced, and under the condition that the opening degree of the first control valve 3 is minimum but the return air temperature is still higher than the upper limit value of 50 ℃, the opening degree of the second control valve 5 is reduced, so that the return air temperature meets the requirement of the upper limit value of 50 ℃.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made without departing from the principles of the invention, and these modifications and equivalents are intended to be included within the scope of the claims.
Claims (4)
1. A tobacco leaf temperature and humidity control device is characterized by comprising:
a drum (1) provided with an inlet and an outlet, configured to bring tobacco leaves into rotation and to convey them from the inlet to the outlet;
the detection device is used for detecting the return air temperature of the roller (1) and the outlet moisture content of the tobacco leaves; and
the adjusting device is used for adjusting the outlet moisture content of the tobacco leaves to reach or approach a first preset moisture content infinitely on the premise that the return air temperature is kept within a first preset range, the first preset range is a preset target control range of the return air temperature of the roller (1), and the first preset moisture content is a target value of the outlet moisture content of the tobacco leaves;
the adjusting device comprises:
a heating device (2) arranged at the inlet of the drum (1) and used for heating the airflow entering the drum (1);
a first control valve (3) for controlling the heating temperature of the heating device (2);
the first conveying pipe (4) is arranged at an inlet of the roller (1) and is used for introducing steam into the roller (1);
a second control valve (5) for regulating the flow rate of the first delivery pipe (4); and
the control device is in signal connection with the first control valve (3) and the second control valve (5) and is configured to enable the return air temperature to be kept within the first preset range by adjusting the opening degrees of the first control valve (3) and the second control valve (5), and the outlet moisture content of the tobacco leaves reaches or infinitely approaches to the first preset moisture content;
the control device is configured to: when the moisture content of the outlet of the tobacco leaves is higher than the first preset moisture content and the return air temperature of the roller (1) is higher than the lower limit value of the first preset range, reducing the opening degree of the second control valve (5); when the moisture content of the outlet of the tobacco leaves is higher than the first preset moisture content and the return air temperature of the roller (1) is lower than the lower limit value of the first preset range, increasing the opening degree of the first control valve (3); when the opening degree of the first control valve (3) is adjusted to be maximum and the return air temperature of the roller (1) is still lower than the lower limit value of the first preset range, the opening degree of the second control valve (5) is increased so that the return air temperature of the roller (1) is at least higher than the lower limit value of the first preset range; and/or, the control device is configured to: when the moisture content of the outlet of the tobacco leaves is lower than the first preset moisture content and the return air temperature of the roller (1) is lower than the upper limit value of the first preset range, increasing the opening degree of the second control valve (5); when the moisture content of the outlet of the tobacco leaves is lower than the first preset moisture content and the return air temperature of the roller (1) is higher than the upper limit value of the first preset range, reducing the opening degree of the first control valve (3); when the opening degree of the first control valve (3) is adjusted to be minimum and the return air temperature of the roller (1) is still higher than the upper limit value of the first preset range, the opening degree of the second control valve (5) is reduced so that the return air temperature of the roller (1) is at least lower than the upper limit value of the first preset range.
2. The tobacco temperature and humidity control device according to claim 1, wherein the heating device (2) comprises a heat exchanger (21) and a second duct (22), the second duct (22) being adapted to convey a hot gas into the heat exchanger (21), the hot gas having a temperature greater than the temperature of the gas flow at the inlet of the drum (1).
3. The tobacco leaf temperature and humidity control device according to claim 1, further comprising a fan (6) and a third delivery pipe (7), wherein the fan (6) is arranged at an outlet of the roller (1), and the third delivery pipe (7) is communicated with the fan (6) and an inlet of the roller (1).
4. A tobacco leaf temperature and humidity control method is characterized by comprising the following steps:
setting a target control range of return air temperature of a roller (1) as a first preset range, and setting a target value of outlet moisture content of tobacco leaves as a first preset moisture content, wherein the roller (1) is provided with an inlet and an outlet, and the roller (1) is used for driving the tobacco leaves to turn over and conveying the tobacco leaves from the inlet to the outlet;
detecting the return air temperature of the roller (1) and the outlet moisture content of the tobacco leaves; and
on the premise that the return air temperature is kept within the first preset range, adjusting the moisture content of the outlet of the tobacco leaves and enabling the outlet to reach or approach the first preset moisture content infinitely;
on the premise that the return air temperature is kept within the first preset range, the operation of adjusting the moisture content of the outlet of the tobacco leaves and enabling the outlet of the tobacco leaves to reach or approach the first preset moisture content infinitely comprises the following steps:
a heating device (2) is arranged at an inlet of the roller (1), the heating device (2) is used for heating airflow entering the roller (1), and the heating device (2) is provided with a first control valve (3) used for controlling heating temperature;
a first conveying pipe (4) is communicated with an inlet of the roller (1), the first conveying pipe (4) is used for introducing steam into the roller (1), and a second control valve (5) used for adjusting the flow is arranged on the first conveying pipe (4); and
the return air temperature is kept within the first preset range by adjusting the opening degrees of the first control valve (3) and the second control valve (5), and the moisture content of the outlet of the tobacco leaves reaches or is infinitely close to the first preset moisture content;
the operation of adjusting the opening degrees of the first control valve (3) and the second control valve (5) includes:
when the moisture content of the outlet of the tobacco leaves is higher than the first preset moisture content and the return air temperature of the roller (1) is higher than the lower limit value of the first preset range, reducing the opening degree of the second control valve (5); when the moisture content of the outlet of the tobacco leaves is higher than the first preset moisture content and the return air temperature of the roller (1) is lower than the lower limit value of the first preset range, increasing the opening of the first control valve (3); when the opening degree of the first control valve (3) is adjusted to be maximum and the return air temperature of the roller (1) is still lower than the lower limit value of the first preset range, the opening degree of the second control valve (5) is increased so that the return air temperature of the roller (1) is at least higher than the lower limit value of the first preset range;
and/or the operation of adjusting the opening degree of the first control valve (3) and the second control valve (5) comprises:
when the moisture content of the outlet of the tobacco leaves is lower than the first preset moisture content and the return air temperature of the roller (1) is lower than the upper limit value of the first preset range, increasing the opening degree of the second control valve (5); when the moisture content of the outlet of the tobacco leaves is lower than the first preset moisture content and the return air temperature of the roller (1) is higher than the upper limit value of the first preset range, reducing the opening degree of the first control valve (3); when the opening degree of the first control valve (3) is adjusted to be minimum and the return air temperature of the roller (1) is still higher than the upper limit value of the first preset range, the opening degree of the second control valve (5) is reduced so that the return air temperature of the roller (1) is at least lower than the upper limit value of the first preset range.
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| CN114545995B (en) * | 2022-03-10 | 2023-05-16 | 安徽中烟工业有限责任公司 | Control method for loosening and conditioning return air temperature |
| CN114963748A (en) * | 2022-06-17 | 2022-08-30 | 东莞信易电热机械有限公司 | Control method, dehumidifying dryer, and storage medium |
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| JPS6024171A (en) * | 1983-07-21 | 1985-02-06 | 日本たばこ産業株式会社 | Controller of moisture and temperature in tobacco moisture conditioning machine |
| CN203168000U (en) * | 2013-02-07 | 2013-09-04 | 中国烟草总公司郑州烟草研究院 | Device for improving uniformity of conditioning moisture content of reconstituted tobacco leaves through paper-making method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6054028B2 (en) * | 1983-12-23 | 1985-11-28 | 日本たばこ産業株式会社 | Tobacco drying and conditioning equipment |
| CN103082390B (en) * | 2013-01-29 | 2015-08-12 | 福建中烟工业有限责任公司 | The control method that a kind of drum-type cut-tobacco drier three grades regulates |
| CN104068460B (en) * | 2014-07-21 | 2015-11-25 | 江西中烟工业有限责任公司井冈山卷烟厂 | A kind of control method regulating tobacco leaf moisture content, temperature |
| CN104824818B (en) * | 2015-03-27 | 2016-06-15 | 厦门烟草工业有限责任公司 | The control method of warming and humidifying apparatus and process hot blast and system |
| CN110150711B (en) * | 2019-05-31 | 2021-08-20 | 杭州安脉盛智能技术有限公司 | Moisture control method and system for moisture regain and humidification process based on multiple regression |
| CN111671121A (en) * | 2020-07-21 | 2020-09-18 | 厦门烟草工业有限责任公司 | Material moisture content control system, drum-type cut tobacco dryer and material moisture content control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6024171A (en) * | 1983-07-21 | 1985-02-06 | 日本たばこ産業株式会社 | Controller of moisture and temperature in tobacco moisture conditioning machine |
| CN203168000U (en) * | 2013-02-07 | 2013-09-04 | 中国烟草总公司郑州烟草研究院 | Device for improving uniformity of conditioning moisture content of reconstituted tobacco leaves through paper-making method |
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