CN203314089U - Cut-tobacco roller drying outlet moisture control system based on moisture removal humidity - Google Patents
Cut-tobacco roller drying outlet moisture control system based on moisture removal humidity Download PDFInfo
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- CN203314089U CN203314089U CN201320178540XU CN201320178540U CN203314089U CN 203314089 U CN203314089 U CN 203314089U CN 201320178540X U CN201320178540X U CN 201320178540XU CN 201320178540 U CN201320178540 U CN 201320178540U CN 203314089 U CN203314089 U CN 203314089U
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Abstract
The utility model provides a cut-tobacco roller drying outlet moisture control system based on a moisture removal humidity, which comprises a controller unit, a pneumatic actuator, a moisture instrument and a moisture removal humidity sensor, wherein the controller unit comprises a first PID (Proportion Integration Differentiation) controller, a second PID controller and a feedforward compensation controller; the controller unit, the pneumatic actuator, an air door and a cut-tobacco drier are connected sequentially; the humidity H of moisture removal air is set as a regulating variable for performing PID control on moisture of a cut-tobacco roller drying outlet; a humidity control domain of the moisture removal air is set; and the moisture of cut-tobacco at the roller drying outlet of the cut-tobacco drier is controlled by PID in real time. On the basis that stable inner quality of the cut-tobacco is ensured, the accuracy and the stability of cut-tobacco outlet moisture control can be improved; the system is simple in structure, and easy to realize; and the medium humidity detection is relatively accurate, and a detection device is cheap and easy to buy, so that the moisture of the cut-tobacco roller drying outlet can be controlled accurately and stably.
Description
Technical field
The utility model relates to a kind of cut tobacco roller drying moisture content of outlet control system based on humidity discharging humidity.
Background technology
In tobacco processing course, the roller cut tobacco drying is the important step on primary processing line, its main technique task one is to make to export by drying and dehydrating the applicable moisture rolled that the cut tobacco water content reaches the cigarette process requirement, the 2nd, under the prerequisite improved in inherent quality, pass through loose curl, cut tobacco filling value is increased, improve online expansion effect, reduce and roll consumption.This process operation principle be leaf storing cabinet out and the tobacco leaf with certain moisture content after chopping, weigh through belted electronic balance by setting flow, and enter cylinder cut tobacco dryer after warming and humidifying; Vapor heated barrel and hot blast provide drying source for cut tobacco, and hot blast carries moisture and the dust of the dry evaporation of cut tobacco and discharged by exhausting moisture pipeline, make to export cut tobacco moisture and reduce, and reach the moisture content of outlet requirement of setting, also reach the purpose of online silk leaf expansion.
Making the moisture that dries rear cut tobacco reach the quality index of regulation, and make the moisture uniformity of all output cut tobaccos, is key and the difficult point of drying process Control System Design.Barrel or hot blast temperature using in most cut-tobacco drier cut tobacco moisture PID control as manipulated variable, and by regulating barrel steam pressure or hot air heat exchanger heating steam pressure, regulation and control cut tobacco moisture reaches the requirement of outlet moisture content.Yet because the cylinder thermal inertia is larger, the barrel temperature-responsive lags behind, and frequent adjustment barrel wall temperature etc. are controlled moisture content of outlet, easily cause the fluctuation of outlet cut tobacco moisture; Simultaneously, because barrel or hot blast temperature are larger on the impact of cut tobacco inherent quality, this mode also is unfavorable for that the cut tobacco inherent quality is stable and controls.Part roller drying process starts to adopt hot blast and humidity discharging air quantity as manipulated variable at present, the regulation and control moisture content of outlet.Mainly by back segment humidity of media especially in the remote-effects cylinder, and then act on the cut tobacco dry run due to hot blast and humidity discharging air quantity.Thereby compare with drying medium humidity, hot blast and humidity discharging air quantity are poor with the directly related property of cut tobacco moisture content of outlet.In addition, under this control mode, more cut-tobacco drier is indirectly to reflect air quantity by detecting the throttle opening signal at present, and in fact, one side throttle opening and airflow value non-linear relation, even moreover the blower fan frequency is all consistent with throttle opening, and the parameters such as wind-warm syndrome are when different, air quantity also may be variant, therefore by detecting the throttle opening signal, indirectly reflects that the control mode of air quantity also can affect the moisture control accuracy.
The utility model content
The utility model provides a kind of cut tobacco roller drying moisture content of outlet control system based on humidity discharging humidity, its purpose is to overcome deficiency of the prior art, by humidity discharging rheumatism degree sensor is set at cylinder discharging cover, and using humidity discharging humidity as manipulated variable, regulation and control cut tobacco moisture content of outlet, guaranteeing on the basis that the cut tobacco inherent quality is stable, improving accuracy, stability that cut tobacco roller drying moisture content of outlet is controlled.
A kind of cut tobacco roller drying moisture content of outlet control system based on humidity discharging humidity, comprise controller unit, pneumatic actuator, Moisture Meter and humidity discharging humidity sensor, wherein controller unit comprises a PID controller, the 2nd PID controller and feedforward compensation controller, controller unit, pneumatic actuator, air door and cut-tobacco drier are connected successively, the input of Moisture Meter is connected with the outlet of cut-tobacco drier, the output of Moisture Meter is connected with controller unit, the humidity discharging humidity sensor is arranged at the air door outlet, and the output of humidity discharging humidity sensor is connected with controller unit.
Described Moisture Meter is infrared moisture meter.
Utilize a PID controller and the 2nd PID controller, using the difference of cut tobacco humidity discharging humidity of cut tobacco humidity discharging humidity set-point and Real-time Collection as the input signal of the 2nd PID controller, the output signal of the 2nd PID controller is the throttle opening value;
Wherein, cut tobacco humidity discharging humidity set-point is cut tobacco humidity the first setting value and cut tobacco humidity the second setting value sum;
Cut tobacco humidity the first setting value is the output quantity of feedforward compensation module, and the input quantity of described feedforward compensation module comprises material cylinder porch cut tobacco flow, entrance moisture and material drum outlet place cut tobacco moisture setting value;
Cut tobacco humidity the second setting value is to utilize cut tobacco moisture and the cut tobacco moisture setting value X of cut-tobacco drier drum outlet place Real-time Collection
0The input signal of difference as a PID controller after, the cut tobacco humidity value of a PID controller output.
It is control mode of the prior art that described adjustment roll barrel temperature is controlled cut-tobacco drier drum outlet cut tobacco moisture.
Beneficial effect
The utility model provides a kind of cut tobacco roller drying moisture content of outlet control system based on humidity discharging humidity, this device comprises controller unit, pneumatic actuator, Moisture Meter and humidity discharging humidity sensor, wherein controller unit comprises a PID controller, the 2nd PID controller and feedforward compensation controller, controller unit, pneumatic actuator, air door and cut-tobacco drier are connected successively, the input of Moisture Meter is connected with the outlet of cut-tobacco drier, the output of Moisture Meter is connected with controller unit, the humidity H of humidity discharging wind is set as to the regulated variable that cut tobacco roller drying moisture content of outlet is carried out to PID control, setting humidity discharging rheumatism degree adjusting territory is [85%, 95%], control in real time cut-tobacco drier roller drying outlet cut tobacco moisture by PID, guaranteeing on the basis that the cut tobacco inherent quality is stable, can improve the accuracy that the cut tobacco moisture content of outlet is controlled, stability, the humidity discharging humidity sensor is arranged at the air door outlet, the output of humidity discharging humidity sensor is connected with controller unit, and this apparatus structure is simple, be easy to realize, because humidity of media detects relatively accurate, and the checkout gear cheapness is easily purchased, control cut tobacco roller drying moisture content of outlet that can accurate stable.
The accompanying drawing explanation
The structural representation that Fig. 1 is the utility model control system;
The control method flow chart that Fig. 2 is control system of the present utility model;
The control block diagram of the control method that Fig. 3 is control system of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing and instantiation, the utility model is described further.
As shown in Figure 1, be control system structural representation of the present utility model.
A kind of cut tobacco roller drying moisture content of outlet control system based on humidity discharging humidity, comprise controller unit, pneumatic actuator, Moisture Meter and humidity discharging humidity sensor, wherein controller unit comprises a PID controller, the 2nd PID controller and feedforward compensation controller, controller unit, pneumatic actuator, air door and cut-tobacco drier are connected successively, the input of Moisture Meter is connected with the outlet of cut-tobacco drier, the output of Moisture Meter is connected with controller unit, the humidity discharging humidity sensor is arranged at the air door outlet, and the output of humidity discharging humidity sensor is connected with controller unit.
The one PID controller course of work:
The P value of the one PID controller, I value and D value are set to respectively 1.2,12 and 10, deviation between the tobacco-dryer exit cut tobacco moisture recorded more in real time and given moisture content of outlet value, according to the deviation signal size, in proportion+differential+integral adjustment rule output cut tobacco humidity the second set-point, and with the cut tobacco humidity first set-point addition of feedforward compensation module output, obtain cut tobacco humidity discharging humidity set-point, input the 2nd PID controller.
The 2nd PID controller course of work:
Second controller P value, I value and D value are set to respectively 2,250 and 200, deviation between the humidity discharging humidity of comparative measurements and cut tobacco humidity discharging humidity set-point, according to the deviation signal size, in proportion+differential+integral adjustment rule output throttle opening signal, this signal is after digital-to-analogue conversion is current analog signal, drive pneumatic actuator to change throttle opening, stablize humidity discharging humidity.
The feedforward compensation controller course of work:
According to the supplied materials moisture in cut tobacco X measured
1, flow of tobacco M
1With given moisture content of outlet value X
0Calculate dehydrating amount Q, i.e. Q=M
1(X
1-X
0)/(1-X
0), specified dehydrating amount is Q
T, Δ Q=Q-Q
TOwing to drying the silk system, near operating point, be linear, feedforward compensation controller, according to dehydrating amount fluctuation signal Δ Q, is exported cut tobacco humidity the first set-point H
1, i.e. H
1=k Δ Q, wherein k is coefficient, the humidity changing value by the analytical unit dehydrating amount obtains.
In conjunction with Fig. 2 and Fig. 3, certain A of cigar mill trade mark module formula cut tobacco production process of take is example, utilizes cut tobacco roller drying moisture content of outlet control system based on humidity discharging humidity to control cut tobacco roller drying moisture content of outlet and is described in detail.
(1) at cylinder discharging cover, humidity discharging rheumatism degree detecting unit is set, the online detection gathers humidity discharging rheumatism degree signal, simultaneously, the humidity H of humidity discharging wind is set as cut tobacco moisture is carried out to the regulated variable of PID control;
(2), according to cut-tobacco drier barrel temperature and the hot blast temperature parameter of certain trade mark product requirement, set 150 ℃ of barrel temperature, 100 ℃ of hot blast temperatures, and setting humidity discharging rheumatism degree adjusting territory is [85%, 95%];
(3) in normal productive process, by Moisture Meter, cut tobacco moisture content of outlet X detected, calculate the moisture content of outlet X and the moisture content of outlet that detect and set value 12.5% deviation delta X, i.e. Δ X=|X-X
0|, if moisture content of outlet deviation delta X≤0.5% enters step 4, otherwise, proceed to step 5;
(4) judge whether humidity discharging wind humidity value H meets 85%<H<95%, if meet, adopts the Double layers PID control method, by change humidity discharging and hot blast throttle opening simultaneously, regulate cut tobacco roller drying moisture content of outlet X; If X>X
0, increase humidity discharging and hot blast throttle opening simultaneously; If X<X
0, reduce humidity discharging and hot blast throttle opening simultaneously, use mouthful water content detection X and setting value X
0Unanimously, return to step 3;
Otherwise, if humidity discharging rheumatism degree H enters step 5 not in scope [85%, 95%];
Adopt the Double layers PID control method in described step 4, control cut-tobacco drier drum outlet place cut tobacco moisture, its specific operation process is as follows:
Utilize a PID controller and the 2nd PID controller, using the difference of cut tobacco humidity discharging humidity of cut tobacco humidity discharging humidity set-point and Real-time Collection as the input signal of the 2nd PID controller, the output signal of the 2nd PID controller is the throttle opening value;
Wherein, cut tobacco humidity discharging humidity set-point is cut tobacco humidity the first setting value and cut tobacco humidity the second setting value sum;
Cut tobacco humidity the first setting value is the output quantity of feedforward compensation module, and the input quantity of described feedforward compensation module comprises material cylinder porch cut tobacco flow, entrance moisture and material drum outlet place cut tobacco moisture setting value;
Cut tobacco humidity the second setting value is to utilize cut tobacco moisture and the cut tobacco moisture setting value X of cut-tobacco drier drum outlet place Real-time Collection
0The input signal of difference as a PID controller after, the cut tobacco humidity value of a PID controller output.
(5) adjustment roll barrel temperature T, by barrel steam pressure valve opening steam regulation pressure, change the barrel temperature, is adjusted to cut-tobacco drier roller drying outlet cut tobacco moisture X and setting value X
0Unanimously; If H<H
min, reduce the barrel steam pressure; If H>H
max, increase the barrel steam pressure; Return to step 3.
It is control mode of the prior art that described adjustment roll barrel temperature is controlled cut-tobacco drier drum outlet cut tobacco moisture.
Under same materials and processing conditions, adopt the utility model method and conventional method to carry out drying to cut tobacco, cut tobacco moisture content of outlet stability is relatively in Table 1, can find out and adopt this method drum outlet cut tobacco moisture mark partially to reduce, the coefficient of variation is starkly lower than conventional method, and the cut tobacco moisture stabilization is obviously improved.
Table 1 cut tobacco drum outlet moisture stabilization relatively
Claims (2)
1. the cut tobacco roller drying moisture content of outlet control system based on humidity discharging humidity, it is characterized in that, comprise controller unit, pneumatic actuator, Moisture Meter and humidity discharging humidity sensor, wherein controller unit comprises a PID controller, the 2nd PID controller and feedforward compensation controller, controller unit, pneumatic actuator, air door and cut-tobacco drier are connected successively, the input of Moisture Meter is connected with the outlet of cut-tobacco drier, the output of Moisture Meter is connected with controller unit, the humidity discharging humidity sensor is arranged at the air door outlet, the output of humidity discharging humidity sensor is connected with controller unit.
2. a kind of cut tobacco roller drying moisture content of outlet control system based on humidity discharging humidity according to claim 1, is characterized in that, described Moisture Meter is infrared moisture meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320178540XU CN203314089U (en) | 2013-04-10 | 2013-04-10 | Cut-tobacco roller drying outlet moisture control system based on moisture removal humidity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320178540XU CN203314089U (en) | 2013-04-10 | 2013-04-10 | Cut-tobacco roller drying outlet moisture control system based on moisture removal humidity |
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| CN203314089U true CN203314089U (en) | 2013-12-04 |
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|---|---|---|---|
| CN201320178540XU Expired - Lifetime CN203314089U (en) | 2013-04-10 | 2013-04-10 | Cut-tobacco roller drying outlet moisture control system based on moisture removal humidity |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729235A (en) * | 2015-03-30 | 2015-06-24 | 浙江迦南科技股份有限公司 | Fluidized bed material constant temperature control system and method |
| CN106213568A (en) * | 2016-09-09 | 2016-12-14 | 福建中烟工业有限责任公司 | Tobacco shreds drying outlet method for controlling water content and device |
| CN108294352A (en) * | 2017-01-11 | 2018-07-20 | 红塔烟草(集团)有限责任公司 | Cylinder cut tobacco dryer material moisture super-limit prewarning control system |
| CN111272955A (en) * | 2020-04-01 | 2020-06-12 | 贵州中烟工业有限责任公司 | Method and device for detecting humidity of baking environment in roller |
| CN113096747A (en) * | 2021-04-12 | 2021-07-09 | 江苏丰尚智能科技有限公司 | Method and device for predicting moisture content of discharged material of dryer and computer equipment |
| CN113576017A (en) * | 2021-07-15 | 2021-11-02 | 河南中烟工业有限责任公司 | Cut tobacco drying water control method |
-
2013
- 2013-04-10 CN CN201320178540XU patent/CN203314089U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104729235A (en) * | 2015-03-30 | 2015-06-24 | 浙江迦南科技股份有限公司 | Fluidized bed material constant temperature control system and method |
| CN104729235B (en) * | 2015-03-30 | 2017-01-18 | 浙江迦南科技股份有限公司 | Fluidized bed material constant temperature control system and method |
| CN106213568A (en) * | 2016-09-09 | 2016-12-14 | 福建中烟工业有限责任公司 | Tobacco shreds drying outlet method for controlling water content and device |
| CN106213568B (en) * | 2016-09-09 | 2018-05-29 | 福建中烟工业有限责任公司 | Tobacco shreds drying exports method for controlling water content and device |
| CN108294352A (en) * | 2017-01-11 | 2018-07-20 | 红塔烟草(集团)有限责任公司 | Cylinder cut tobacco dryer material moisture super-limit prewarning control system |
| CN111272955A (en) * | 2020-04-01 | 2020-06-12 | 贵州中烟工业有限责任公司 | Method and device for detecting humidity of baking environment in roller |
| CN113096747A (en) * | 2021-04-12 | 2021-07-09 | 江苏丰尚智能科技有限公司 | Method and device for predicting moisture content of discharged material of dryer and computer equipment |
| CN113576017A (en) * | 2021-07-15 | 2021-11-02 | 河南中烟工业有限责任公司 | Cut tobacco drying water control method |
| CN113576017B (en) * | 2021-07-15 | 2022-09-23 | 河南中烟工业有限责任公司 | Cut tobacco drying water control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131204 |