CN109259291B - Numerical method for predicting heat and mass transfer rule of tobacco shreds in roller tobacco dryer - Google Patents
Numerical method for predicting heat and mass transfer rule of tobacco shreds in roller tobacco dryer Download PDFInfo
- Publication number
- CN109259291B CN109259291B CN201811373807.4A CN201811373807A CN109259291B CN 109259291 B CN109259291 B CN 109259291B CN 201811373807 A CN201811373807 A CN 201811373807A CN 109259291 B CN109259291 B CN 109259291B
- Authority
- CN
- China
- Prior art keywords
- tobacco
- roller
- cut tobacco
- mass
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/10—Roasting or cooling tobacco
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Manufacture Of Tobacco Products (AREA)
Abstract
The invention discloses a numerical method for predicting the heat and mass transfer rule of tobacco shreds in a roller tobacco dryer, which comprises the steps of dividing the roller tobacco dryer into a plurality of micro units at equal intervals along the axial direction, and establishing a mathematical model of heat and mass transfer aiming at the tobacco shreds and air flow in each micro unit; based on a mass conservation equation, an energy conservation equation and a heat and mass balance equation, performing programming solution by using a computer language; calculating the retention time involved in the tobacco shred heat and mass transfer mathematical model by the tobacco shred motion model and the corrected empirical formula; measuring effective heat exchange coefficients and mass transfer coefficients of the tobacco shreds under different temperature and water content conditions by a test method, establishing a database, and directly calling database data which is programmed when calculating the temperature and the water content of the tobacco shreds along the axial direction of a roller tobacco dryer; and finally, inputting the operation parameters in the production process into a simulation system to obtain the outlet temperature and the water content of the cut tobacco and the temperature and water content change curve of the cut tobacco along the axial direction of the roller cut tobacco dryer.
Description
Technical Field
The invention relates to the fields of chemical industry and tobacco, in particular to a method for measuring the heat and mass transfer rule of tobacco shreds in a roller tobacco dryer.
Background
Drying is a long-standing process, and the main purpose of drying is to remove moisture from materials, so as to facilitate storage, transportation, improve product quality and the like. In the cigarette making process, the tobacco shred drying is a key process in the tobacco shred making process. The heat and mass exchange characteristics of the cut tobacco are directly related to the whole drying or moisture regaining process, so that the moisture content of the particles, the filling capacity of the cut tobacco, the crushing rate of the rolling process and the sensory quality of finished cigarettes are influenced, and the heat and mass exchange characteristics are closely related to the final economic benefit of the cigarette products. In the tobacco shred production process, after the re-baked formula tobacco flakes are subjected to loosening and moisture regaining and charging modulation, the moisture content reaches the level favorable for tobacco deformation, then the tobacco flakes are cut into filiform particles, the moisture content of the tobacco shreds is high, and the cut tobacco shreds are dried to appropriate moisture content for the cigarette making and the cigarette storage of a cigarette making machine favorable for the tobacco shreds. At present, in the production process of the cigarette technology, the optimal operation parameters are usually obtained by adopting a method of debugging operation parameters on site and multiple tests, but the data of the moisture content and the temperature of the cut tobacco in the roller are difficult to measure in the drying process, the traditional experimental method can encounter the obstacles of large workload, high cost, long period, large energy consumption and the like, the production technology level still stays in the stage of operation depending on experience, the improvement of the quality of the cut tobacco is not facilitated, and the advantages of a cut tobacco dryer can not be exerted.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the problems in the prior art, the invention aims to provide a numerical method for predicting the change rule of the temperature and the water content of cut tobacco in the drying process of a roller cut tobacco dryer under different production conditions.
The technical scheme is as follows: a numerical method for predicting the heat and mass transfer rule of tobacco shreds in a roller tobacco dryer comprises the following steps:
the method comprises the following steps: establishing mathematical models of the retention time of the cut tobacco in the roller cut tobacco dryer under different operating conditions; the experimental study is carried out on the retention time of the tobacco shreds in the roller under the conditions of different roller inclination angles, different rotating speeds and different shoveling plate structures, and the experimental study investigates the retention time of the tobacco shred particles in the roller under the conditions of different roller inclination angles (2 degrees, 2.5 degrees and 3 degrees), rotating speeds (8 revolutions per minute, 10 revolutions per minute and 12 revolutions per minute) and shoveling plate structures (2 shoveling plates, 4 shoveling plates and 6 shoveling plates). Then obtaining an empirical formula about the retention time of the cut tobacco after correction based on a Friedman and Marshall model; the empirical formula is programmed into a tobacco shred heat and mass exchange simulation system, and different operation parameters are input to obtain the retention time of the tobacco shreds in a roller tobacco dryer;
step two: establishing a database of effective heat exchange coefficients and mass transfer coefficients in the tobacco shred drying process; measuring effective heat exchange coefficients and mass transfer coefficients of the cut tobacco under different temperature and water content conditions by a test method, establishing a database for reading during prediction calculation, and directly calling database data programmed when calculating the temperature and the water content of the cut tobacco along the axial direction of a roller cut tobacco dryer;
step three: establishing a heat and mass exchange mathematical model of the cut tobacco in the roller cut tobacco dryer under different operating conditions; establishing a mass conservation equation, an energy conservation equation and a heat and mass balance equation in each control micro unit, and calculating the temperature and the water content of the cut tobacco in each unit so as to obtain the change rule of the temperature and the water content of the cut tobacco in the roller cut tobacco dryer along the axial direction; and (3) taking the outlet temperature and the water content of the tobacco shred obtained by calculation in the ith micro unit as inlet parameters of the (i + 1) th micro unit, and repeating the steps to obtain the temperature and water content change rule of the tobacco shred in each micro unit.
In the second step, when the temperature and the water content of the cut tobacco are between certain two values in the database, the cut tobacco is obtained by an interpolation method.
Preferably, in the third step, the temperature and the water content of the cut tobacco in each unit are calculated by using a Jacob iteration method.
Has the advantages that: compared with the prior art, the invention has the following remarkable progress: 1. the drying link in the cigarette processing technology is optimized, the heat and mass transfer rule of the cut tobacco in the drying process in the roller cut tobacco dryer under different operation conditions can be obtained through numerical simulation calculation according to the equipment size and the operation parameters in industrial production, and the outlet temperature and the moisture content of the cut tobacco are forecasted in advance. 2. Can greatly reduce production energy consumption and environmental pollution, improve production efficiency and is suitable for different operating conditions. 3. The measurement accuracy is high, the comparison and verification are carried out with different actual production results, and the relative error is within 10 percent.
Drawings
FIG. 1 is a schematic flow chart of the steps of the present invention;
FIG. 2 is a schematic diagram of the division of the roller microcell;
FIG. 3 is a flow chart of a modeling calculation of an embodiment of the present invention;
FIG. 4 is an interface of a Visual Basic language programming program;
FIG. 5 is an inlet interface for one of the procedures in the dry mode;
FIG. 6 is an input interface for operational parameters;
FIG. 7 is a calculation of moisture content of tobacco shreds and air flow.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the detailed implementation mode as follows:
as shown in figure 1, the invention adopts a method of dividing micro units, divides the roller cut tobacco dryer into a plurality of micro units with equal distance along the axial direction, and establishes a mathematical model of heat and mass transfer aiming at the cut tobacco and air flow in each micro unit. And performing programming solution by using a computer language based on a mass conservation equation, an energy conservation equation and a heat and mass balance equation. The retention time related to the tobacco shred heat and mass transfer mathematical model can be calculated according to the tobacco shred motion model and the corrected empirical formula. The effective heat exchange coefficient and the mass transfer coefficient of the cut tobacco under the conditions of different temperatures and water contents are measured by a test method, the obtained test data is used for establishing a database, and the programmed database data is directly called when the temperature and the water contents of the cut tobacco along the axial direction of the roller cut tobacco dryer are calculated. And finally, inputting the operation parameters in the production process into a simulation system to calculate the outlet temperature and the water content of the cut tobacco and the temperature and water content change curve of the cut tobacco along the axial direction of the roller cut tobacco dryer.
The invention discloses a numerical method for predicting the heat and mass transfer rule of cut tobacco in a roller cut tobacco dryer, a computer software system is compiled based on the method, the size, the rotating speed, the inclination angle, the initial temperature, the water content, the mass flow, the temperature, the humidity and the flow velocity of air flow, the air flow and the movement direction (counter flow or smooth) of the cut tobacco in the roller cut tobacco dryer are input into the compiled software system, the temperature and the water content of the cut tobacco along the axial direction of the roller in the drying process of the cut tobacco in the roller cut tobacco dryer can be output, and a drying curve of the cut tobacco is drawn.
The method is based on the mass conservation law and the energy conservation law, wet dispersion and air flow are influenced by the mixing effect of a feed port and a discharge port at two ends of a roller cut tobacco dryer, the cut tobacco movement and heat and mass transfer are complex, and the proportion of an inlet section and an outlet section of a roller occupying the length of the whole roller is small, so that the mathematical modeling is emphasized on the main drying section of the roller, and the area of the inlet section and the outlet section is not included. The drum is divided into a plurality of equidistant units along the axial direction of the drum, and a mass conservation equation, an energy conservation equation and a heat and mass balance equation are established in each control microcell.
The method of the invention comprises the following main numerical processes:
the method comprises the following steps: and (3) establishing a mathematical model of the retention time of the cut tobacco in the roller cut tobacco dryer under different operation conditions. The experimental study is carried out on the retention time of the cut tobacco in the roller under different roller inclination angles, rotating speeds and shoveling plate structure conditions, and then an empirical formula about the retention time of the cut tobacco after correction is obtained based on a Friedman and Marshall model. The empirical formula is programmed into a tobacco shred heat and mass exchange simulation system, and different operation parameters are input to obtain the retention time of tobacco shreds in a roller tobacco dryer;
step two: and establishing a database of effective heat exchange coefficients and mass transfer coefficients in the tobacco shred drying process. Measuring effective heat exchange coefficients and mass transfer coefficients of the tobacco shreds under different temperature and water content conditions by an experimental method, establishing a database for reading during prediction calculation, and obtaining the effective heat exchange coefficients and the mass transfer coefficients by an interpolation method when the temperature and the water content of the tobacco shreds are between certain two values in the database;
step three: and (3) establishing a heat and mass exchange mathematical model of the cut tobacco in the roller cut tobacco dryer under different operating conditions. And establishing a mass conservation equation, an energy conservation equation and a heat and mass balance equation in each control micro unit, and calculating the temperature and the water content of the tobacco shreds in each unit by using a Jacob iteration method. And (4) taking the outlet temperature and the water content rate of the tobacco shreds calculated in the micro unit i as the inlet parameters of the i +1 unit, and repeating the steps to obtain the temperature and water content change rule of the tobacco shreds in each micro unit.
Examples
As shown in fig. 2, the roller is divided into a plurality of micro units along the axial direction, and based on the following heat conduction, convective heat transfer and convective mass transfer formulas, the energy and mass conservation equation of the heat and mass transfer process in each unit is assumed that the cut tobacco in the roller is in a stable flowing state;
∑Qin＝∑Qout(1)
Q1(i-1)+Q2(i-1)+Hp(i-1)+Hg(i-1)＝Hp(i)+Hg(i) (2)
Q1(i-1)＝α1F1(Tw-Tp(i-1)) (3)
Q2(i-1)＝α2F2(Tw-Tg(i-1)) (4)
Hp(i-1)＝Wdp(Cdp+X(i-1)CH2O)(Tp(i-1)-Tref) (5)
Hg(i-1)＝Wdg(Cdg+Y(i-1)CV)(Tg(i-1)-Tref)+WdgY(i-1)r (6)
wherein, F1The range of (a) is 1/2-2/3 of the surface area of the roller, wherein the value is 0.6; f2Generally 1/3-1/2 of the surface area of the roller, wherein 0.4 is taken;
Q1(i-1)+Q3(i-1)＝Qph+Qv+Qhv(9)
Q3(i-1)＝α3F3(Tg(i-1)-Tp(i-1)) (10)
Qph＝Wdp(Cdp+X(i)CH2O)(Tp(i)-Tp(i-1)) (11)
Qv＝Wdp(X(i-1)-X(i))r (12)
Qhv＝Wdp(X(i-1)-X(i))Cv(Tg(i)-Tp(i-1)) (13)
wherein, F3＝Fm；
Wdp(X(i-1)-X(i))＝Wdg(Y(i)-Y(i-1)) (16)
M(i)＝kmFm(cg(i)-cp(i))Mr(17)
M(i-1)＝-WdgdY (18)
jH＝StPr2/3(20)
jM＝jH(22)
Wherein, taumThe average retention time of the cut tobacco in the roller is;
the parameters in the above formula are defined as follows:
Cdg: the specific heat capacity of the dry air is kJ/kg.K;
Cdp: the specific heat capacity of the dry particles is kJ/kg.K;
cg(i) the method comprises the following steps The water concentration in the gas stream per unit volume is expressed in kmol/m3；
CH2O: specific heat of water, unit is kJ/kg.K;
cp(i) the method comprises the following steps The water concentration in the granules per unit volume is kmol/m3；
Cv: specific heat of the steam, with the unit of kJ/kg.K;
d: the inner diameter unit of the roller is m;
F1: the contact area of the tobacco shreds in the micro-units and the wall surface of the cylinder is m2；
F2: the contact area of the wall surface of the inner cylinder of the microcell and the airflow is m2；
F3: the contact area between the air flow in the micro-unit and the tobacco shred is m2；
Hg: enthalpy of the gas flow, in units of W;
Hp: the enthalpy of the tobacco shreds, in W;
km: convective mass transfer coefficient in kg/m2·s；
Q1(i) The method comprises the following steps The heat conduction quantity of the tobacco shreds and the wall surface of the cylinder in the micro unit i is W;
Q2(i) the method comprises the following steps The convective heat exchange quantity between the wall surface of the inner cylinder of the microcell i and the airflow is W;
Q3(i) the method comprises the following steps The convection heat exchange quantity of the air flow and the tobacco shreds in the micro unit i is W;
Qhv: the heat required for water evaporation is in W;
Qph: the heat of the tobacco shreds is W;
Qv: latent heat of vaporization in units of W;
r: latent heat of vaporization of water, in kJ/kg;
Tg(i) the method comprises the following steps The temperature of the air flow in the microcell i is K;
Tp(i) the method comprises the following steps The temperature of the tobacco shreds in the micro unit i is K;
Tref: reference temperature in K;
Tw: the wall temperature of the roller is K;
Wdg: dry air mass flow rate in kg/s;
Wdp: the mass flow of the dry cut tobacco is kg/s;
x (i): the moisture content of the cut tobacco dry basis in the micro unit i is kg/kg;
y (i): the humidity of the air flow in the microcell i is kg/kg;
α1: the heat conductivity coefficient between the wall surface of the cylinder and the cut tobacco is W/m2·K；
α2: the convective heat transfer coefficient between the wall surface of the cylinder and the air flow is W/m2·K；
α3: the convective heat transfer coefficient between the tobacco shreds and the air flow is W/m2·K；
Programming and solving the formulas through Visual Basic language to obtain the temperature and the moisture content of the tobacco shreds in each micro unit and the temperature and the humidity of the air flow;
drawing a temperature and moisture content change curve of the cut tobacco in the roller and a temperature and humidity change curve of the air flow through Visual Basic language programming, and outputting the curves;
the heat and mass transfer rule of the tobacco shreds in the roller tobacco dryer is predicted by changing the operation parameters related in the formula, such as the roller rotating speed, the inclination angle, the tobacco shred inlet temperature, the tobacco shred mass flow, the air flow speed, the humidity, the roller wall surface temperature and the like.
FIG. 4 is an interface of a program written in Visual Basic language, illustrating that the three drying modes of the tumble dryer can be conveniently integrated into one program. Fig. 5 is an entry interface for one of the procedures in the dry mode. FIG. 6 is an input interface of operational parameters, illustrating that the temperature and moisture content change curves of the air flow and cut tobacco in the roller dryer can be obtained quickly by changing the operational parameters. FIG. 7 is the calculation result of the moisture content of the tobacco shred and the air flow, which illustrates that the above procedure can directly guide the air flow and the change situation of the tobacco shred in the roller tobacco dryer, and intuitively shows the heat and mass transfer rule of the tobacco shred in the roller tobacco dryer.
In conclusion, the invention can rapidly obtain the heat and mass exchange rules of the cut tobacco in the drying process of the roller cut tobacco dryer under the condition of multivariable (roller size, inclination angle, rotating speed, cut tobacco initial temperature, moisture content, mass flow, air flow temperature, humidity and speed, cut tobacco and air flow countercurrent and concurrent flow) by the method of dividing the roller cut tobacco dryer into a plurality of micro units along the axial direction.
Claims (2)
1. A numerical method for predicting the heat and mass transfer law of cut tobacco in a roller cut tobacco dryer is characterized by comprising the following steps:
the method comprises the following steps: establishing mathematical models of the retention time of tobacco shreds in a roller tobacco dryer under the conditions of different roller lengths, roller inner diameters, roller inclination angles, roller rotating speeds, tobacco shred mass flow rates, tobacco shred equivalent diameters and air flow speeds; the method comprises the following steps of carrying out experimental research on the retention time of cut tobacco in a roller under the conditions of different roller lengths, roller inner diameters, roller inclination angles, roller rotating speeds, cut tobacco mass flow rates, cut tobacco equivalent diameters and air flow rates, and obtaining an empirical formula about the retention time of the cut tobacco after correction based on a Friedman and Marshall model, wherein the empirical formula is as follows:
wherein, taumThe average retention time of tobacco shreds in the roller, D is the inner diameter of the roller, L is the length of the roller, S is the inclination angle of the roller, N is the rotating speed of the roller, SsIs the mass flow of tobacco shreds, dpIs the equivalent diameter of the tobacco shreds, G is the gas flow, 0.3344 and 0.6085 are constants;
the empirical formula is programmed into a tobacco shred heat and mass exchange simulation system, and the retention time of tobacco shreds in a roller tobacco dryer is obtained by inputting different roller lengths, roller inner diameters, roller rotating speeds, roller inclination angles, tobacco shred mass flow, tobacco shred equivalent diameters and air flow speeds;
step two: establishing a database of effective heat exchange coefficients and mass transfer coefficients in the tobacco shred drying process; measuring effective heat exchange coefficients and mass transfer coefficients of the cut tobacco under different temperature and water content conditions by a test method, establishing a database according to the effective heat exchange coefficients and the mass transfer coefficients, and directly calling database data which are programmed when calculating the temperature and the water content of the cut tobacco along the axial direction of a roller cut tobacco dryer;
step three: dividing the roller cut-tobacco drier into a plurality of micro units with equal intervals along the axial direction by adopting a micro unit dividing method; changing parameters of the length of the roller, the inner diameter of the roller, the inclination angle of the roller, the rotating speed of the roller, the mass flow rate of the cut tobacco, the equivalent diameter of the cut tobacco and the air flow speed to obtain different operating conditions, and establishing a heat and mass exchange mathematical model of the cut tobacco in the roller cut tobacco dryer under the different operating conditions; establishing a mass conservation equation, an energy conservation equation and a heat and mass balance equation in each control micro unit, and calculating the temperature and the water content of the tobacco shreds in each micro unit; and (3) taking the outlet temperature and the water content of the tobacco shred obtained by calculation in the ith micro unit as inlet parameters of the (i + 1) th micro unit, and repeating the steps to obtain the temperature and water content change rule of the tobacco shred in each micro unit.
2. A numerical method for predicting the heat and mass transfer law of shredded tobacco in a rotary drum dryer according to claim 1, characterized in that: in the second step, when the temperature and the water content of the cut tobacco are between certain two values in the database, the cut tobacco is obtained by an interpolation method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811373807.4A CN109259291B (en) | 2018-11-19 | 2018-11-19 | Numerical method for predicting heat and mass transfer rule of tobacco shreds in roller tobacco dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811373807.4A CN109259291B (en) | 2018-11-19 | 2018-11-19 | Numerical method for predicting heat and mass transfer rule of tobacco shreds in roller tobacco dryer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109259291A CN109259291A (en) | 2019-01-25 |
| CN109259291B true CN109259291B (en) | 2020-10-02 |
Family
ID=65189673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811373807.4A Active CN109259291B (en) | 2018-11-19 | 2018-11-19 | Numerical method for predicting heat and mass transfer rule of tobacco shreds in roller tobacco dryer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109259291B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110013044B (en) * | 2019-04-29 | 2022-06-21 | 贵州中烟工业有限责任公司 | Method for obtaining barrel temperature by calculating dehydration amount of KLD-2 cut-tobacco drier |
| CN110432529B (en) * | 2019-06-20 | 2021-07-09 | 云南省烟草农业科学研究院 | Flue-cured tobacco scientific curing method based on transplanting period, fertilizing amount and rainfall amount |
| CN111651893B (en) * | 2020-06-12 | 2023-06-27 | 福建中烟工业有限责任公司 | Method for establishing bead explosion drying model for cigarettes |
| CN112034095B (en) * | 2020-07-10 | 2021-08-20 | 张家口卷烟厂有限责任公司 | System and method for analyzing structure of cut tobacco after online drying |
| CN112034791B (en) * | 2020-07-10 | 2021-08-17 | 张家口卷烟厂有限责任公司 | Intelligent control system and method for sheet cut-tobacco drier |
| CN113609660B (en) * | 2021-07-27 | 2024-03-15 | 江苏科技大学 | Numerical simulation method for predicting heat transfer rule of clothes in clothes dryer |
| CN117158613A (en) * | 2022-07-01 | 2023-12-05 | 张家口卷烟厂有限责任公司 | Intelligent judging system for state of thin plate wire drying equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3905123A (en) * | 1973-10-15 | 1975-09-16 | Industrial Nucleonics Corp | Method and apparatus for controlling a tobacco dryer |
| 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 |
| CN108720069A (en) * | 2018-06-20 | 2018-11-02 | 福建中烟工业有限责任公司 | The method of dry pipe tobacco and the device of prediction outlet moisture content of cut tobaccos |
-
2018
- 2018-11-19 CN CN201811373807.4A patent/CN109259291B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3905123A (en) * | 1973-10-15 | 1975-09-16 | Industrial Nucleonics Corp | Method and apparatus for controlling a tobacco dryer |
| 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 |
| CN108720069A (en) * | 2018-06-20 | 2018-11-02 | 福建中烟工业有限责任公司 | The method of dry pipe tobacco and the device of prediction outlet moisture content of cut tobaccos |
Non-Patent Citations (3)
| Title |
|---|
| 基于多因素分析的烘丝机入口含水率预测模型的建立与应用;钟文焱等;《烟草科技》;20150515(第05期);第67-73页 * |
| 滚筒烘丝机中烟丝运动的模拟与试验;邓国栋等;《烟草科技》;20070920(第09期);第13-18页 * |
| 滚筒烘丝机内烟丝滞留时间模型的建立及数值模拟;周凯敏等;《烟草科技》;20160531(第05期);第94-99页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109259291A (en) | 2019-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109259291B (en) | Numerical method for predicting heat and mass transfer rule of tobacco shreds in roller tobacco dryer | |
| JP6362541B2 (en) | Method and apparatus for moisture determination and control | |
| Kelly | Rotary drying | |
| CN110150711B (en) | Moisture control method and system for moisture regain and humidification process based on multiple regression | |
| CN111241754B (en) | Soft measurement method for key process parameters of paper drying | |
| CN106773657A (en) | A kind of roller drying unstable state process head material and the optimising and adjustment method in tailing stage | |
| Noh et al. | CFD simulation of temperature and air flow distribution inside industrial scale solar dryer | |
| TW201907317A (en) | Mixing machine control device, kneading machine control method, program | |
| Mondal et al. | Intensify staple fibre drying by optimizing air distribution in multistage convective dryer using CFD | |
| CN107194113B (en) | Roller drying experimental equipment and method for establishing tobacco roller drying REA model | |
| CN111728253B (en) | Control method and system for tobacco airflow drying strength | |
| Misha et al. | Simulation of air flow distribution in a tray dryer by CFD | |
| CN117346516A (en) | Sludge dryer operation adjusting method based on online measurement of water content and heat value | |
| CN112471572B (en) | Method and system for controlling consistency of processing strength of tobacco tunnel type temperature increasing equipment | |
| Vasić et al. | Optimize, upgrade or invest in a novel dryer?—A brick factory case study | |
| Penkova et al. | Finite elements analysis of mass transfer and mechanical processes in ceramic ware at convective drying | |
| Zhu et al. | Investigation on the transport characteristics of typical biological slender particles in a pilot-scale rotary dryer | |
| Sutherland | Batch grain drier design and performance prediction | |
| Mirade | Computational fluid dynamics (CFD) modelling applied to the ripening of fermented food products: Basics and advances | |
| Ajala | The implementation of a dualistic model for scale up of a tunnel drying of cassava chips | |
| Kocsis et al. | Investigation of moisture content fluctuation in mixed flow dryer | |
| Wawrzyniak et al. | Two phase CFD model of a counter-current spray drying process | |
| CN110879929A (en) | Numerical simulation method for predicting residence time of fibrillar biomass particles in rotary drum | |
| Liao et al. | Structure Optimization of Outlet Uniformity for a Comas Tower Dryer | |
| Wu et al. | Construction of mathematical model of tobacco roaster based on mechanism analysis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20190125 Assignee: Center for technology transfer Jiangsu University of Science and Technology Assignor: JIANGSU University OF SCIENCE AND TECHNOLOGY Contract record no.: X2021980006173 Denomination of invention: Numerical method for predicting heat and mass transfer law of cut tobacco in drum dryer Granted publication date: 20201002 License type: Common License Record date: 20210714 |
|
| EC01 | Cancellation of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Center for technology transfer Jiangsu University of Science and Technology Assignor: JIANGSU University OF SCIENCE AND TECHNOLOGY Contract record no.: X2021980006173 Date of cancellation: 20210826 |