CN104013089A - Hot air variable temperature tobacco shred drying device and warm-keeping drying test method thereof - Google Patents
Hot air variable temperature tobacco shred drying device and warm-keeping drying test method thereof Download PDFInfo
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Abstract
The invention provides a hot air variable temperature tobacco shred drying device and a variable temperature drying test method thereof. The device comprises a tobacco shred drying box and a damp and hot air controlling and conveying system. The device is characterized in that the tobacco shred drying box is divided into a high-temperature drying room and a low-temperature drying room which are different in drying temperature, the damp and hot air controlling and conveying system comprises an air compressor, a humidity control system and two air heaters, the two air heaters are communicated with the high-temperature drying room and the low-temperature drying room respectively so as to achieve variable temperature heating, and a material containing device and a temperature and humidity probe are arranged in the tobacco shred drying box. According to the variable temperature drying test method, the tobacco shred drying process comprises a front section of drying the tobacco shreds at high temperature and a rear section of drying the tobacco shreds at low temperature until the target water content is reached. Due to the variable temperature drying method, the physical property of the tobacco shreds can be improved, the machinability resistance of the tobacco shreds is improved, the sensory quality of the dried tobacco shreds can be improved, the basic test method is provided for enterprises to optimize the technological process, and related fundamental research data are provided for variable temperature drying of the tobacco shreds.
Description
Technical field
The present invention relates to tobacco (or living beings of similar tobacco) manufacture field, specifically a kind of pipe tobacco hot blast alternating temperature drying device and alternating temperature drying test method thereof.
Background technology
The dry process of utilizing heat energy to reduce or remove water-containing materials moisture that is often referred to, dry run is the general unit operations of application, at industrial or agricultural everyway, be widely used, relate to the every field such as chemical industry, food, agricultural, light industry, building, coal, weaving, timber.Tobacco shreds drying is the critical process in Cigarette processing, and the moisture content of cut tobaccos after cutting is higher, need to pass through drying, makes moisture content of cut tobaccos uniformity, with the aesthetic quality who adapts to the requirement rolling and improve cut tobacco.The drying property of pipe tobacco mainly discloses in freeze-day with constant temperature process at present, and in drying equipment, the temperature of drying medium is substantially constant.But there is a lot of problems through the long-term freeze-day with constant temperature that experimental studies have found that: the first, in the dry run of pipe tobacco, because dry environment temperature remains unchanged, cause dry environment can not adapt to the variation of material state.In the tobacco shreds drying later stage, because the moisture content of pipe tobacco reduces greatly, for the heat of transpiring moisture greatly for the lifting of pipe tobacco temperature, cause pipe tobacco okioplast to internal contraction, it is more and more less that space between cells becomes, internal moisture is transmitted and is become more difficult to outside, will cause like this physical characteristic of pipe tobacco to have greatly changed, and finally have influence on the resistance to processability of pipe tobacco.The second, lasting high temperature drying can exert an adverse impact to the aroma component of pipe tobacco and conventional chemical composition, and finally has influence on the organoleptic quality of cigarette.
Alternating temperature is dry is a kind of novel dry technology, by industry-by-industry, is utilized more and more widely.Traditional drying means is: adopt constant drying medium temperature material to be dried until desired moisture.The dry basic ideas of alternating temperature are: according to the residing different drying stages of material, adopt different medium temperatures to realize the method for dried material, namely first by relatively high medium temperature, material is dried, while being reduced to a certain Appropriate Deng material water ratio, reduce drying medium temperature, dried material is until target moisture content.Adopt the dry technique of alternating temperature not only can improve the physical characteristic of the material that is dried, further improve the resistance to processability of material, can also improve the organoleptic quality of the material that is dried.
Up to now, to the research of the alternating temperature drying process of pipe tobacco seldom, for the dry device of pipe tobacco alternating temperature, be few equally.Therefore can design and a kind ofly be applicable to the dry device of pipe tobacco alternating temperature and design corresponding alternating temperature drying test method caused relevant insider's concern.
Summary of the invention
Object of the present invention, just based on above-mentioned prior art situation, provides a kind of for pipe tobacco hot blast alternating temperature drying device and alternating temperature drying test method.
The object of the invention is to be achieved through the following technical solutions:
Pipe tobacco hot blast alternating temperature drying device of the present invention, the damp-heat air that comprises tobacco shreds drying chamber and be connected with tobacco shreds drying chamber is controlled and induction system, wherein: tobacco shreds drying chamber is separated into two high and low temperature hothouses that baking temperature is different by an insulation plate; Described damp-heat air is controlled and induction system comprises that air compressor, MCS and two groups of air heaters form, described MCS is comprised of steam generator, heating jacket, steam front pump and temperature controller, and two groups of air heaters are communicated with to realize alternating temperature heating with high and low temperature hothouse respectively; In tobacco shreds drying case, be provided with container and humiture probe.
Control respectively by You Yi road air heating system, steam application system and data acquisition display system for described high and low temperature test hothouse, high and low temperature hothouse is arranged side by side and separates by a plate, for holding the charge basket of pipe tobacco, can move back and forth at two drying test boxes.High temperature, low temperature drying chamber are the fixed-bed type structure of convection heat transfer' heat-transfer by convection, in high and low temperature hothouse bottom, are provided with for the equally distributed dispersion plate of heated air, and heated air stream is from bottom to top dried the pipe tobacco in charge basket by chamber bottom.
Described container is cylindric container, and container bottom be netted through hole structure, to guarantee that thermal current is entered by container bottom, through the interior pipe tobacco of barrel, by drying box top, is discharged, and reaches and makes the pipe tobacco dry object that heats up.
In described low temperature drying chamber, be provided with for container being pushed to the delivery device of high-temperature drying chamber, this delivery device is comprised of an arc snap ring and connected push rod.
Utilizing above-mentioned alternating temperature drying device to carry out the dry test method of alternating temperature comprises the following steps:
(1) moisture in cut tobacco modulation: with the moisture content of oven method measuring test pipe tobacco, needed amount of water when calculating a certain amount of pipe tobacco and reaching predetermined initial aqueous rate M0, adds water and mix pipe tobacco, standby after the sealing 48h that is packed in bag;
(2) device preheating: set high and low temperature hothouse temperature and hot blast wind speed in pipe tobacco hot blast alternating temperature drying device, wherein high-temperature drying chamber's hot blast temperature scope is arranged on 100-150 ℃, low temperature drying chamber hot blast temperature scope is arranged on 60-100 ℃, and hot blast wind speed is arranged on 0-1.2m/s scope;
(3) predrying test: after hot blast temperature, hot blast wind speed are stablized, 10g tobacco sample evenly dispenses on container with lamelliform, and container is placed in high-temperature drying chamber; Adopt weight reduction, in the time interval of pressing 5-60s under predetermined experimental condition, measure pipe tobacco at t1, t2, t3 ... the moisture content of the different drying times such as tn, thus the drying curve of pipe tobacco obtained; According to drying curve, determine that tobacco shreds drying is to a certain specific moisture content M needed drying time of tx;
(4) alternating temperature drying test: separately by 10g pipe tobacco in the indoor heated-air drying of carrying out of high temperature drying, when reach in above-mentioned steps (3) determined time tx drying time, the container that pipe tobacco is housed is transferred to low temperature drying indoor, pipe tobacco continues to be dried to 12.5% moisture low temperature drying is indoor;
(5) sample analysis: after dry end, pipe tobacco is taken out to packed sealing, as the chemical qualities such as the physical qualities such as tobacco fill value, flavor component and aesthetic quality's detection sample.
It is dry that apparatus of the present invention can realize the convection current alternating temperature of pipe tobacco, and test method is simple, can improve resistance to processability and the organoleptic quality of dry rear pipe tobacco, for optimization of enterprises drying process provides a kind of basic experimental technique.The experimental condition of drying device can be contained the working conditions such as the hot blast temperature, wind speed of actual production process, and test specimen amount can meet compared with multianalysis test request.
Accompanying drawing explanation
Fig. 1 hot blast alternating temperature drying device front view.
Fig. 2 hot blast alternating temperature drying device side view.
Fig. 3 is MCS schematic diagram.
Fig. 4 is delivery device schematic diagram.
In Fig. 1-4: 1. air compressor, 2. mass flowmenter, 3. MCS, 3-1. steam generator, 3-2. temperature controller, 3-3. plunger displacement pump, 3-4. heating jacket, 4. heater, 5. temp probe, 6. temperature and humidity control instrument, 7. low temperature drying chamber, 8. high-temperature drying chamber, 9. insulation plate, 10. delivery device, 11. containers, 12. dispersion plates, 13. humiture probes, 14. conical pipes
Fig. 5 is the filling value of pipe tobacco under different drying conditions.
Fig. 6 is the total amount of flavor component under different drying conditions.
The specific embodiment
Alternating temperature drying device of the present invention is described further below in conjunction with accompanying drawing:
As described in Fig. 1,2: a kind of pipe tobacco hot blast alternating temperature drying device, the damp-heat air that comprises tobacco shreds drying case and be connected with tobacco shreds drying case is controlled and induction system, wherein: tobacco shreds drying case is separated into two high and low temperature hothouses (7,8) that baking temperature is different by an insulation plate (9); Described damp-heat air is controlled and induction system comprises that air compressor (1), MCS (3) and two groups of air heaters form, described MCS (3) forms (referring to Fig. 3) by steam generator (3-1), heating jacket (3-4), steam plunger pump (3-3) and temperature controller (3-2), and two groups of air heaters (4) are communicated with to realize alternating temperature heating with high and low temperature hothouse respectively; In tobacco shreds drying case, be provided with container (11) and humiture probe (13).
In low temperature drying chamber (8), be provided with for container being pushed to the delivery device (10) of high-temperature drying chamber (7), this delivery device forms (referring to Fig. 4) by an arc snap ring and connected push rod.
Container is tubbiness container, and container bottom be netted through hole structure, to guarantee that thermal current is entered by container bottom, through the interior pipe tobacco of barrel, by drying box top, is discharged, and reaches and makes the pipe tobacco dry object that heats up.
In high and low temperature hothouse bottom, be provided with for the equally distributed dispersion plate of heated air (12).Two groups of air heaters pass into respectively high and low temperature hothouse bottom by two groups of conveyance conduits.
The course of work is described below by reference to the accompanying drawings: air compressor is inputted hot blast alternating temperature drying device by compressed air, gas can divide two-way to enter respectively two heaters, the temperature that regulates respectively two heater powers to make to enter the gas of hothouse meets dry requirement (left hothouse is high-temperature drying chamber, and right hothouse is low temperature drying chamber); Regulate steam generator and the plunger displacement pump of MCS that steam is sprayed into air heater inside, make respectively the gas humidity that enters left and right two hothouses meet dry requirement, the heating jacket on jet chimney and temperature controller are controlled the temperature of steam to avoid steam-condensation; Difference quality of regulation flowmeter, thus make dry gas pass through two of left and right hothouse with certain flow velocity.Treat by the gas temperature of left and right two hothouses, humidity, flow velocity all meets while requiring separately, the pipe tobacco of the certain moisture content of certain mass is put into container, container is put into the dry pipe tobacco of left hothouse (high-temperature drying chamber), because pipe tobacco initial aqueous rate is known, so adopt weight reduction, measure the moisture content of pipe tobacco, when recording moisture content of cut tobaccos and arrive a certain Appropriate, take out out the insulation plate that connects left and right hothouse, utilize push rod that container is pushed to right hothouse, draw back push rod, close insulation plate, allow pipe tobacco be dried until target moisture content under the drying condition of right hothouse (low temperature drying chamber).
Utilizing above-mentioned alternating temperature drying device to carry out the dry test method of alternating temperature comprises the following steps:
(1) moisture in cut tobacco modulation: with the moisture content of oven method measuring test pipe tobacco, needed amount of water when calculating a certain amount of pipe tobacco and reaching predetermined initial aqueous rate M0, adds water and mix pipe tobacco, standby after the sealing 48h that is packed in bag;
(2) device preheating: set high and low temperature hothouse temperature and hot blast wind speed in pipe tobacco hot blast alternating temperature drying device, wherein high-temperature drying chamber's hot blast temperature scope is arranged on 100-150 ℃, low temperature drying chamber hot blast temperature scope is arranged on 60-100 ℃, and hot blast wind speed is arranged on 0-1.2m/s scope;
(3) predrying test: after hot blast temperature, hot blast wind speed are stablized, 10g tobacco sample evenly dispenses on container with lamelliform, and container is placed in high-temperature drying chamber; Adopt weight reduction, in the time interval of pressing 5-60s under predetermined experimental condition, measure pipe tobacco at t1, t2, t3 ... the moisture content of the different drying times such as tn, thus the drying curve of pipe tobacco obtained; According to drying curve, determine that tobacco shreds drying is to a certain specific moisture content M needed drying time of tx;
(4) alternating temperature drying test: separately by 10g pipe tobacco in the indoor heated-air drying of carrying out of high temperature drying, when reach in above-mentioned steps (3) determined time tx drying time, the container that pipe tobacco is housed is transferred to low temperature drying indoor, pipe tobacco continues to be dried to 12.5% moisture low temperature drying is indoor;
(5) sample analysis: after dry end, pipe tobacco is taken out to packed sealing, as the chemical qualities such as the physical qualities such as tobacco fill value, flavor component and aesthetic quality's detection sample.
As shown in Figure 5: to the freeze-day with constant temperature under different hot blast temperatures, tobacco fill value increases with the increase of hot blast temperature.This is because baking temperature is higher, and pipe tobacco rate of water loss is faster, and under the effect of stress that pipe tobacco produces in inner humiture variation, curling deformation extent is higher, thereby the fillibility of pipe tobacco is increased.Under different alternating temperature drying conditions, the filling value of pipe tobacco is all higher than freeze-day with constant temperature result under back segment low temperature hot blast condition, and lower than freeze-day with constant temperature result under leading portion high-temperature hot-air condition.For 100 ℃ of-70 ℃ of alternating temperature drying conditions, tobacco fill value connects and is bordering on 100
oc high-temperature hot-air freeze-day with constant temperature result.
As shown in Figure 6: adopt respectively 100 ℃, 70 ℃ and 70 ℃ of 100 ℃ of back segments of leading portion (separation is that moisture content 19% goes out), pipe tobacco flavor component total amount during tobacco shreds drying to 12.5% that just moisture content is 30%, under low temperature drying condition as seen from the figure, pipe tobacco flavor component total amount is higher than pipe tobacco flavor component total amount under high temperature drying condition, the total amount of the alternating temperature drying mode flavor component of employing leading portion high temperature back segment low temperature, between high temperature drying and low temperature drying, is close with low temperature drying apparently higher than high temperature drying.
Claims (6)
1. a pipe tobacco hot blast alternating temperature drying device, the damp-heat air that comprises tobacco shreds drying case and be connected with tobacco shreds drying case is controlled and induction system, it is characterized in that: tobacco shreds drying case is separated into two high and low temperature hothouses that baking temperature is different by an insulation plate; Described damp-heat air is controlled and induction system comprises that air compressor, MCS and two groups of air heaters form, described MCS is comprised of steam generator, heating jacket, steam front pump and temperature controller, and two groups of air heaters are communicated with to realize alternating temperature heating with high and low temperature hothouse respectively; In tobacco shreds drying case, be provided with container and humiture probe.
2. pipe tobacco hot blast alternating temperature drying device according to claim 1, is characterized in that: in low temperature drying chamber, be provided with for container being pushed to the delivery device of high-temperature drying chamber, this delivery device is comprised of an arc snap ring and connected push rod.
3. pipe tobacco hot blast alternating temperature drying device according to claim 1, is characterized in that: container is tubbiness container, and container bottom is netted through hole structure.
4. pipe tobacco hot blast alternating temperature drying device according to claim 1, is characterized in that: in high and low temperature hothouse bottom, be provided with for the equally distributed dispersion plate of heated air.
5. pipe tobacco hot blast alternating temperature drying device according to claim 1, is characterized in that: two groups of air heaters pass into respectively high and low temperature hothouse bottom by two groups of conveyance conduits.
6. one kind is utilized alternating temperature drying device described in claim 1 to carry out the dry test method of alternating temperature, it is characterized in that: this experimental technique is to be dried to realize by pipe tobacco being successively placed in high temperature in alternating temperature drying device, low temperature drying chamber, high and low temperature hothouse respectively You Yi road air heating system, steam application system and data acquisition display system is controlled, and concrete test method step is as follows:
(1) moisture in cut tobacco modulation: with the moisture content of oven method measuring test pipe tobacco, needed amount of water when calculating a certain amount of pipe tobacco and reaching predetermined initial aqueous rate M0, adds water and mix pipe tobacco, standby after the sealing 48h that is packed in bag;
(2) device preheating: set high and low temperature hothouse temperature and hot blast wind speed in pipe tobacco hot blast alternating temperature drying device, wherein high-temperature drying chamber's hot blast temperature scope is arranged on 100-150 ℃, low temperature drying chamber hot blast temperature scope is arranged on 60-100 ℃, and hot blast wind speed is arranged on 0-1.2m/s scope;
(3) predrying test: after hot blast temperature, hot blast wind speed are stablized, 10g tobacco sample evenly dispenses on container with lamelliform, and container is placed in high-temperature drying chamber; Adopt weight reduction, in the time interval of pressing 5-60s under predetermined experimental condition, measure pipe tobacco at t1, t2, t3 ... the moisture content of the different drying times such as tn, thus the drying curve of pipe tobacco obtained; According to drying curve, determine that tobacco shreds drying is to a certain specific moisture content M needed drying time of tx;
(4) alternating temperature drying test: separately by 10g pipe tobacco in the indoor heated-air drying of carrying out of high temperature drying, when reach in above-mentioned steps (3) determined time tx drying time, the container that pipe tobacco is housed is transferred to low temperature drying indoor, pipe tobacco continues to be dried to 12.5% moisture low temperature drying is indoor;
(5) sample analysis: after dry end, pipe tobacco is taken out to packed sealing, as the chemical qualities such as the physical qualities such as tobacco fill value, flavor component and aesthetic quality's detection sample.
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Cited By (5)
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| CN104266933A (en) * | 2014-10-28 | 2015-01-07 | 中国烟草总公司郑州烟草研究院 | Device and method for on-line detection of water content of materials during vacuum drying |
| CN107462598A (en) * | 2017-07-17 | 2017-12-12 | 河南中烟工业有限责任公司 | A kind of method of pipe tobacco heating degree in measure convective drying |
| CN109870382A (en) * | 2019-04-12 | 2019-06-11 | 中国烟草总公司郑州烟草研究院 | A method of moisture content of cut tobaccos is quickly detected based on two stages temperature method |
| CN110063514A (en) * | 2019-04-29 | 2019-07-30 | 广东中烟工业有限责任公司 | A kind of miniature air stream baking silk experimental provision |
| CN114459219A (en) * | 2022-02-14 | 2022-05-10 | 珠海格力电器股份有限公司 | Control method and controller for compressor heating belt and heat pump drying unit |
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| CN114459219A (en) * | 2022-02-14 | 2022-05-10 | 珠海格力电器股份有限公司 | Control method and controller for compressor heating belt and heat pump drying unit |
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