CN101356992A - Downstream type tobacco-dryer exit tobacco-shred water control method - Google Patents
Downstream type tobacco-dryer exit tobacco-shred water control method Download PDFInfo
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- CN101356992A CN101356992A CNA2007100528686A CN200710052868A CN101356992A CN 101356992 A CN101356992 A CN 101356992A CN A2007100528686 A CNA2007100528686 A CN A2007100528686A CN 200710052868 A CN200710052868 A CN 200710052868A CN 101356992 A CN101356992 A CN 101356992A
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Abstract
The invention discloses a method for controlling moisture of tobacco shreds at an outlet of a parallel-flow tobacco dryer, and relates to a production control method in the tobacco industry. The method is characterized in that: in a production phase, the required value of the moisture of the tobacco shreds at the outlet is taken as a target, the precedence of control and adjustment is determined according to the opening degree of a moisture draining air door and a hot wind air door, the temperature of hot wind and the temperature of a wall; the overall principle is firstly controlling and adjusting the parameters which have little impact on the internal quality of the tobacco shreds and the smoking and then controlling and adjusting the parameters which have great impact on the internal quality of the tobacco shreds and the smoking; the sequence is as follows: (1) first the opening degrees of the moisture draining air door and the hot wind air door are controlled and adjusted; (2) then the hot wind temperature is controlled and adjusted; (3) and finally the wall temperature is controlled and adjusted. The method for controlling moisture content of tobacco shreds has the advantage that the wall temperature is basically kept constant in the production process, which is beneficial to stabilizing and unifying the inner quality and style of the tobacco products. The method can provide a technical means for individualized production and classification processing of the cigarettes.
Description
Technical field
The present invention relates to the production control method of tobacco business, the method for in especially a kind of tobacco business the downstream type tobacco-dryer exit moisture in cut tobacco being controlled.
Background technology
Fixedly parameters such as hot blast air door and humidity discharging air door, hot blast temperature, drum speed are adopted in the production control of the downstream type tobacco-dryer of prior art, and adjusting barrel method of temperature is controlled the outlet moisture in cut tobacco.Under this cut-tobacco drier control method, other parameter is all fixed, and only regulates the barrel temperature, causes in the production process barrel temperature fluctuation bigger.In recent years, the recent studies on of tobacco business is recognized, the barrel temperature is the factor that in all parameters of cut-tobacco drier cigarette product interior quality and suction flavor style is had the greatest impact, the barrel temperature fluctuation means the product interior quality greatly and inhales flavor style instability in the process, therefore, the cut-tobacco drier control method of prior art requires to exist with product quality and conflicts.In addition, at present, the industry proposes the requirement of personalization of product production and classification processing, and cut-tobacco drier barrel temperature need be carried out product processing under different setting values, and the cut-tobacco drier control method of prior art obviously can't satisfy such requirement.
Summary of the invention
Above-mentioned deficiency at prior art the purpose of this invention is to provide a kind of downstream type tobacco-dryer exit tobacco-shred water control method, and the cut-tobacco drier control method that solves prior art requires conflicting of existence with product quality.This method can guarantee that the moisture of tobacco-dryer exit pipe tobacco meets the requirements, and can make the barrel temperature keep stable, thereby the interior quality that guarantees pipe tobacco is unaffected with suction flavor style.This method adapts to the requirement of personalization of product production and classification processing fully.
Downstream type tobacco-dryer exit tobacco-shred water control method of the present invention according to pipe tobacco specification, processing request, and technological parameter produce, contain stub bar stage, production phase and material tail stage, adopt computer control system to carry out process control, it is characterized in that:
Enter the production phase, when production process is controlled and is regulated, with outlet moisture in cut tobacco required value is target, according to the aperture of humidity discharging air door and hot blast air door, hot blast temperature, barrel temperature to the pipe tobacco interior quality and the influence degree of inhaling flavor, arrange the precedence that above-mentioned technological parameter is controlled and regulated, the overall principle is to the pipe tobacco interior quality and inhales the control earlier of the little parameter of flavor influence and regulate, and influence control and adjusting after the big parameter;
Each technological parameter is controlled in the following order:
(1) at first controls and regulates the aperture of humidity discharging air door and hot blast air door;
(2) start the control and the adjusting of hot blast temperature subsequently, the condition that starts is: (predetermined upper and lower limit described here is meant in the production when the regulated value of the aperture of humidity discharging air door and hot blast air door reaches preset upper limit or lower limit, according to appointed condition, product requirement, the controlled condition of the humidity discharging air door of production commander department regulation and the aperture of hot blast air door, the maximum opening and the minimum opening value that promptly produce to allow), and outlet moisture in cut tobacco measured value is not when still reaching the moisture requirement value;
(3) start control of barrel temperature and adjusting at last, the condition of startup:
1. at first carry out this condition, when hot blast temperature control with regulate 3 minutes, outlet moisture in cut tobacco measured value changed less than 0.3% o'clock, start, and condition described in no longer carrying out 2.;
2. in 1. the listed condition, after hot blast temperature control and regulating, the hot blast temperature regulated value reaches preset upper limit or lower limit, and (predetermined upper and lower limit described here is meant in the production, according to appointed condition, product requirement, produce the controlled condition of the hot blast temperature of commander department regulation, the maximum temperature and the minimum temperature value that promptly produce to allow), and outlet moisture in cut tobacco measured value starts when still not reaching the moisture requirement value.
Described downstream type tobacco-dryer exit tobacco-shred water control method carries out according to the concrete steps of following order:
(1) increases drying by the fire the FEEDFORWARD CONTROL and the adjusting of preceding flow of tobacco
Detect the moisture value and the flow of cut-tobacco drier inlet pipe tobacco, comparing with outlet moisture in cut tobacco required value obtains actual dehydrating amount; When the drying capacity of actual dehydrating amount, promptly during standard dehydrating amount (theoretical dehydrating amount), reduce the flow of inlet pipe tobacco greater than cut-tobacco drier; Otherwise then strengthen the flow of inlet pipe tobacco, above-mentioned adjusted inlet flow of tobacco is fixed as electronic scale flow setting value before the baking of this batch material;
(2) the stub bar stage, the barrel temperature adopts the gradual manner that raises gradually, aperture in the middle of humidity discharging air door and hot blast air door are stabilized in, when the deviation between baking silk moisture content of outlet measured value and the moisture requirement value less than 0.3% the time, the barrel temperature is adjusted to typical set value, and (this also is meant according to appointed condition, product requirement, the value of the barrel temperature of production division's regulation) also keeps stable, can enter the production phase;
(3) production phase
Described aperture of at first controlling and regulating humidity discharging air door and hot blast air door, be according to detecting data, when outlet moisture in cut tobacco measured value during greater than the moisture requirement value, the aperture of controller control hot blast air door and humidity discharging air door increases, otherwise the aperture of then controlling hot blast air door and humidity discharging air door reduces;
The described hot blast temperature that starts is subsequently controlled and is regulated, and is according to detecting data, and when exporting the moisture in cut tobacco measured value greater than the moisture requirement value, the raising of controller control hot blast temperature reduces otherwise then control hot blast temperature;
Described last startup barrel temperature control and adjusting are according to detecting data, and when exporting the moisture in cut tobacco measured value greater than the moisture requirement value, controller application cylinder wall temperature rises, otherwise then the application cylinder wall temperature descends;
(4) the material tail stage, the barrel temperature adopts the gradual manner that reduces gradually, and the aperture of humidity discharging air door and hot blast air door is still controlled by the production phase control method.
Advantage of the present invention is: preferentially adjust cut-tobacco drier to product endoplasm and the little technological parameter of style influence, and stable to product endoplasm and the big key process parameter of style influence, realize the stable control of moisture content of outlet.Compare with the method for prior art cut-tobacco drier, the barrel temperature keeps stable basically in the production process of the present invention, described to the barrel temperature controlling with regulate compared with prior art, the amplitude of regulating is less, only be equivalent to " fine setting ", therefore, help keeping the stable and uniformity of cigarette product inherent quality style in process.Can realize simultaneously personalization production and the classification processing down of the different barrel desired temperatures of cut-tobacco drier, processing for the personalization production of cigarette product and classification provides technological means.
Description of drawings
Accompanying drawing 1 is the downstream type tobacco-dryer system schematic.
Accompanying drawing acceptance of the bid keep the score state as follows: 1-initial moisture content instrument; Electronic scale before the 2-baking; 3-warming and humidifying equipment; The 4-cut-tobacco drier; The 5-hot air duct; 6-hot blast air door; 7-humidity discharging air door; The 8-exhausting moisture pipeline; 9-tobacco-dryer exit Moisture Meter.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention and relevant technologies problem are described in further detail.
Accompanying drawing 1 is the downstream type tobacco-dryer system schematic.Initial moisture content instrument 1 is used to detect cut-tobacco drier supplied materials moisture in cut tobacco; Electronic scale 2 is control type electronic scales before the baking, its belt speed can be regulated, and when flow of tobacco on the electronic scale during greater than flow setting value, electronic scale reduces the belt speed of service, otherwise then increase the belt speed of service, be stabilized in the electronic scale flow setting value thereby control enters the flow of tobacco of cut-tobacco drier; Hot blast air door 6 all is connected with controller with humidity discharging air door 7, can control and regulate; Moisture Meter 9 is used to detect the tobacco-dryer exit moisture in cut tobacco.Cut-tobacco drier 4, hot air duct 5, exhausting moisture pipeline 8 and warming and humidifying equipment 3 are prior art equipment.
At first simply introduce the downstream type tobacco-dryer course of work and situation, the general every batch processed pipe tobacco of downstream type tobacco-dryer amount be 5000kg to 10000kg, wherein stub bar stage, material each approximate number of tail stage minute, about 2～2.5h of production phase.In ordinary production, difference according to pipe tobacco kind and specification, the difference of cut-tobacco drier and other corollary equipment, producing commander department all can have a predetermined value or title setting value or claim desired value each technological parameter, and control of the present invention and adjusting are to carry out in the scope of this predetermined value or title setting value or title desired value.For example, that is to say that " the barrel temperature is adjusted to typical set value " described in the concrete steps " (2) stub bar stage " adjusting of barrel temperature can not exceed the scope of the bound of this typical set value, all the other together.
Baking silk process can be understood like this: the pipe tobacco that the cut-tobacco drier porch flows into is made up of dried pipe tobacco and water, and the amount of dried pipe tobacco is constant in the cut-tobacco drier process, and part water is evaporated through behind the cut-tobacco drier.The pipe tobacco that flows out cut-tobacco drier contains the whole dried pipe tobacco of inflow and remaining water after evaporating.In the control model, baking silk import and export pipe tobacco dry measure is constant all the time, and the amount that is changed is exactly a water, i.e. dehydrating amount.
Below the specific embodiment of an embodiment is carried out concise and to the point description.
The major technique thought of described " to the FEEDFORWARD CONTROL and the adjusting of flow of tobacco before drying by the fire " is exactly to allow cut-tobacco drier be operated under the situation of standard dehydration value, in theory, corresponding pipe tobacco specification of each cut-tobacco drier and process conditions all should have the dehydration value of a standard, just said theoretical water evaporation quantity, this is that those skilled in the art all have the knack of in the prior art.It is described in the present invention that preceding flow of tobacco carries out FEEDFORWARD CONTROL and adjusting can be finished in the time of start about 200 seconds to drying by the fire.Process is such: cut-tobacco drier inlet flow of tobacco and inlet moisture in cut tobacco are detected by the electronic scale and the Moisture Meter of cut-tobacco drier inlet respectively, in 200 second time, carried out several times and detect (carrying out once) as per 5 seconds, with all detection data input controllers, and get its mean value, carry out following calculating by controller: this inlet pipe tobacco is detected mean value deduct outlet moisture in cut tobacco required value and multiply by inlet pipe tobacco average discharge again and promptly obtain actual moisture in cut tobacco evaporation capacity, the theoretical water evaporation quantity of this actual moisture in cut tobacco evaporation capacity and cut-tobacco drier is compared.When actual moisture in cut tobacco evaporation capacity during greater than theoretical water evaporation quantity, controller reduces the flow of tobacco of cut-tobacco drier inlet; When actual moisture in cut tobacco evaporation capacity during less than theoretical water evaporation quantity, controller increases the flow of tobacco of cut-tobacco drier inlet.Above-mentioned adjusted inlet flow of tobacco is fixed as electronic scale flow setting value before the baking of this batch material; Every batch is only carried out once to drying by the fire the FEEDFORWARD CONTROL and the adjusting of preceding flow of tobacco.
The described stub bar stage, when the supplied materials pipe tobacco enters the cut-tobacco drier initial stage, in the approximate number minute, in order to reduce the dried head amount of pipe tobacco, adopt the gradual manner that raises gradually in stub bar stage barrel temperature controlling, aperture in the middle of humidity discharging air door and hot blast throttle opening are stabilized in, when the difference of baking silk moisture content of outlet measured value and outlet moisture in cut tobacco required value less than 0.3% the time, the end of cut-tobacco drier stub bar stage enters the production phase, controller begins to control and regulate to hot blast air door and humidity discharging air door, and simultaneously the barrel temperature is adjusted to typical set value (this be production division assign according to equipment characteristic and product specification barrel temperature value) and kept stable by currency.
In the production phase, it is constant that the barrel temperature is pressed the standard setting value stabilization, and hot blast air door and the interlock of humidity discharging air door are controlled and regulated according to outlet moisture in cut tobacco measured value, regulate the moisture content of outlet size by changing its aperture.Hot blast air door and humidity discharging throttle opening are by hot blast air door in the computer control system and the control of humidity discharging air door PID controller, system will dry by the fire silk moisture content of outlet measured value and be real-time transmitted to the PID controller, the PID controller will dry by the fire silk moisture content of outlet measured value and compare computing with outlet moisture in cut tobacco required value, calculate regulated value according to its deviation size and send hot blast air door and humidity discharging air door to.When drying by the fire silk moisture content of outlet measured value greater than outlet moisture in cut tobacco required value, corresponding increase hot blast air door and humidity discharging throttle opening, when drying by the fire silk moisture content of outlet measured value less than outlet moisture in cut tobacco required value, then corresponding hot blast air door and the humidity discharging throttle opening turned down is until baking silk moisture content of outlet measured value with to export the moisture in cut tobacco required value consistent or be close.
When hot blast air door and humidity discharging throttle opening be adjusted to less than 45% or greater than 65% after (these two opening values promptly are the predetermined values of this batch production of assigning of production division), when baking silk outlet moisture in cut tobacco does not reach outlet moisture in cut tobacco required value yet, control system thinks that the regulating power of humidity discharging air door and hot blast air door has been tending towards saturated, the control and the adjusting of the hot blast temperature of then starting by sequence.Hot blast temperature is controlled by the hot blast temperature controller in the computer control system, system will dry by the fire silk moisture content of outlet measured value and be real-time transmitted to controller, controller will dry by the fire silk moisture content of outlet measured value and once compare with outlet moisture in cut tobacco required value every 10 seconds, as when drying by the fire a moisture content of outlet measured value greater than outlet moisture in cut tobacco required value, corresponding to 0.5 ℃ of hot blast temperature rising, when drying by the fire silk moisture content of outlet measured value less than outlet moisture in cut tobacco required value, then corresponding hot blast temperature is reduced by 0.5 ℃, until baking silk moisture content of outlet measured value with to export the moisture in cut tobacco required value consistent or be close.
When hot blast temperature be adjusted to less than or greater than 10 ℃ of technological standards values after (described technological standards value is the index that production division assigns, being higher or lower than this index also is for 10 ℃ the index control range of assigning), if baking silk outlet moisture in cut tobacco measured value does not reach outlet moisture in cut tobacco required value yet, then start barrel adjustment moisture content of outlet at last.The barrel temperature is controlled by the barrel temperature controller in the computer control system, system will dry by the fire silk moisture content of outlet measured value and be real-time transmitted to controller, controller will dry by the fire silk moisture content of outlet measured value and once compare with outlet moisture in cut tobacco required value every 6 seconds, as when drying by the fire a moisture content of outlet measured value greater than outlet moisture in cut tobacco required value, corresponding to 0.1 ℃ of barrel temperature rising, as when drying by the fire a moisture content of outlet measured value less than outlet moisture in cut tobacco required value, then corresponding the barrel temperature is reduced by 0.1 ℃, consistent or be close until baking silk moisture content of outlet measured value and outlet moisture in cut tobacco required value.
Whether regulating measures such as hot blast temperature and barrel temperature effectively can be provided with in control system.
Some tobacco-dryer exit moisture regulates to hot blast temperature that insensitive (this is that this is the prior art content, does not give unnecessary details at this with the design feature of cut-tobacco drier and the decision of corollary equipment characteristics.), then abandon the adjusting of hot blast temperature this moment, directly enters the adjusting of barrel temperature.
Finish to enter a baking material tail during stage in the production phase, the barrel temperature adopts the gradual manner that reduces gradually, and control of hot blast air door and humidity discharging air door simultaneously and adjusting keep the requirement of production phase, to reduce the dried tail amount of pipe tobacco.
Practical application effect of the present invention: get when producing product under totally 22 batches of original cut-tobacco drier control methods barrel temperature fluctuation situation data at random continuously and analyze, the barrel temperature fluctuation is bigger, barrel temperature standard deviation mean value has reached 1.83 ℃, and the fluctuating range of barrel temperature has reached 19 ℃ in the production process of some batch products; The requirement of barrel temperature departure technological standards value ± 5 ℃, in 22 batches of productions the barrel temperature qualified be lower than 50% batch just have 6 batches, average barrel temperature qualified only is 71.65%, the deviation maximum between barrel temperature central value and the technological standards required value batch reached 25 ℃; Baking silk moisture content of outlet mean standard deviation is 0.155%.Production situation combined data to cut-tobacco drier control method of the present invention is analyzed, altogether 50 the sampling batch in, the barrel temperature is basicly stable in process of production constant, mean standard deviation only is 0.1 ℃; The barrel temperature has reached the technological standards requirement all, and average barrel temperature qualified reaches 100%, and the deviation maximum batch also only is 2 ℃ between barrel temperature measured value and the technological standards required value; Baking silk moisture content of outlet mean standard deviation reaches 0.103%.
Claims (2)
1, a kind of downstream type tobacco-dryer exit tobacco-shred water control method, according to pipe tobacco specification, processing request, and technological parameter produce, contain stub bar stage, production phase and material tail stage, adopt computer control system to carry out process control and adjusting, it is characterized in that:
Enter the production phase, when production process is controlled and is regulated, with outlet moisture in cut tobacco required value is target, according to the aperture of humidity discharging air door and hot blast air door, hot blast temperature, barrel temperature to the pipe tobacco interior quality and the influence degree of inhaling flavor, arrange the precedence that above-mentioned technological parameter is controlled and regulated, the overall principle is to the pipe tobacco interior quality and inhales the control earlier of the little parameter of flavor influence and regulate, and influence control and adjusting after the big parameter;
Each technological parameter is controlled in the following order and is regulated:
(1) at first controls and regulates the aperture of humidity discharging air door and hot blast air door;
(2) start the control and the adjusting of hot blast temperature subsequently, the condition of startup is: when the regulated value of the aperture of humidity discharging air door and hot blast air door reaches preset upper limit or lower limit, and outlet moisture in cut tobacco measured value is not when still reaching the moisture requirement value;
(3) start control of barrel temperature and adjusting at last, the condition of startup:
1. at first carry out this condition, after hot blast temperature control and regulating 3 minutes, outlet moisture in cut tobacco measured value changed less than 0.3% o'clock, start, and condition described in no longer carrying out 2.;
2. in 1. the listed condition, after hot blast temperature control and regulating, the hot blast temperature regulated value reaches preset upper limit or lower limit, and outlet moisture in cut tobacco measured value starts when still not reaching the moisture requirement value.
2, downstream type tobacco-dryer exit tobacco-shred water control method according to claim 1 is characterized in that:
Described downstream type tobacco-dryer exit tobacco-shred water control method carries out according to the concrete steps of following order:
(1) increases the FEEDFORWARD CONTROL and the adjusting of drying by the fire preceding flow of tobacco
Detect the moisture value and the flow of cut-tobacco drier inlet pipe tobacco, comparing with outlet moisture in cut tobacco required value obtains actual dehydrating amount; When the drying capacity of actual dehydrating amount, promptly during the standard dehydrating amount, reduce the flow of inlet pipe tobacco greater than cut-tobacco drier; Otherwise then strengthen the flow of inlet pipe tobacco, this adjusted inlet flow of tobacco is fixed as electronic scale flow setting value before the baking of this batch material;
(2) the stub bar stage, the barrel temperature adopts the gradual manner that raises gradually, aperture in the middle of humidity discharging air door and hot blast air door are stabilized in, when the deviation between baking silk moisture content of outlet detected value and the moisture requirement value less than 0.3% the time, the barrel temperature is adjusted to typical set value and kept stable, can enter the production phase;
(3) production phase
Described aperture of at first controlling and regulating humidity discharging air door and hot blast air door, be according to detecting data, when outlet moisture in cut tobacco measured value during greater than the moisture requirement value, the aperture of controller control hot blast air door and humidity discharging air door increases, otherwise the aperture of then controlling hot blast air door and humidity discharging air door reduces;
The described hot blast temperature that starts is subsequently controlled and is regulated, and is according to detecting data, and when exporting the moisture in cut tobacco measured value greater than the moisture requirement value, the rising of controller control hot blast temperature reduces otherwise then control hot blast temperature;
Described last startup barrel temperature control and adjusting are according to detecting data, and when exporting the moisture in cut tobacco measured value greater than the moisture requirement value, controller application cylinder wall temperature rises, otherwise then the application cylinder wall temperature descends;
(4) the material tail stage
The barrel temperature adopts the gradual manner that reduces gradually, and the aperture of humidity discharging air door and hot blast air door is still controlled by the production phase control method.
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| CN2007100528686A CN101356992B (en) | 2007-07-31 | 2007-07-31 | Downstream type tobacco-dryer exit tobacco-shred water control method |
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| CN2007100528686A CN101356992B (en) | 2007-07-31 | 2007-07-31 | Downstream type tobacco-dryer exit tobacco-shred water control method |
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