CN111678844A - A method for expressing overlapping space and overlapping degree based on tobacco leaf feed - Google Patents

Abstract

The invention discloses a method for expressing the overlapping space and overlapping degree based on tobacco leaf feed liquid, which belongs to the field of tobacco feeding technology. The overlapping area of the liquid in the drum is the overlapping space; step 2, define the real space actually occupied by the tobacco leaves in the overlapping space when the tobacco leaf material and liquid are coupled and mixed as the effective overlapping space; step 3, define the ratio of the effective overlapping space to the overlapping space is defined as Overlap degree; step 4, analyze the mapping relationship between the tobacco leaf material-liquid space overlap and process parameters, adjust the relevant process parameters, determine the parameter conditions such as solid phase and liquid phase, and extract the envelope volume of the atomization area to obtain the distribution of atomized particles . The invention solves the phenomenon of lack of suitable evaluation indexes when the tobacco leaf material liquid is coupled and mixed, and can obtain a reasonable, effective and optimized overlapping space and an effective overlapping space state, thereby improving and optimizing the mixing effect.

Description

A method for expressing overlapping space and overlapping degree based on tobacco leaf feed

technical field

The invention belongs to the field of tobacco feeding technology, and more particularly relates to a method for expressing overlapping space and overlapping degree based on tobacco leaf feed liquid.

Background technique

The mixing of the tobacco leaf material and liquid must take place in the space where the tobacco leaves and the material liquid coexist, that is, the mixing can only occur in the overlapping area of the tobacco leaf space and the material liquid space. It is realized through the contact and coupling of the tobacco leaf material liquid. The overlapping area is an important index to evaluate and measure the mixing possibility of tobacco leaf feed and liquid, which can be used to describe the coupling effect of tobacco leaf feed.

However, the feed liquid basically fills the entire space in the overlapping area. Because it is difficult to achieve uniform spatial distribution by throwing, the tobacco leaves generally cannot be evenly distributed in the overlapping space. Therefore, to be precise, the coupling effect (mixing) of the tobacco leaf feed liquid is in the tobacco leaf. Implemented within a portion of the actual space that occupies the overlapping space. The overlapping space can be determined by the tobacco leaf movement space and the material-liquid distribution space, and it is directly related to the various process parameters that affect the tobacco leaf movement and material-liquid distribution. That is, by adjusting the relevant process parameters, a reasonable, effective and optimized overlapping space can be obtained. state, which in turn can improve and optimize the mixing effect.

There is a lack of suitable evaluation indicators when the tobacco leaf feed is coupled and mixed; there is a lack of systematic analysis in judging the rationality and advantages of the evaluation indicators by adjusting the relevant process parameters.

SUMMARY OF THE INVENTION

The present invention provides a method based on the overlapping space and overlapping degree representation of tobacco leaf feed liquid, which is used to solve the phenomenon of lack of suitable evaluation indicators when the tobacco leaf feed liquid is coupled and mixed. Reasonable, effective and optimized overlapping space and effective overlapping space state can obtain the appropriate degree of overlap, thereby improving and optimizing the mixing effect.

In order to achieve the above object, the present invention adopts the following technical solutions to realize: the method for the overlapping space and overlapping degree of the tobacco leaf feed liquid is realized by the following steps:

step1, define the overlapping area of the tobacco leaf material liquid in the drum as the overlapping space;

Step 2, define the real space actually occupied by the tobacco leaves in the overlapping space when the tobacco leaf material liquid is coupled and mixed as the effective overlapping space;

step3, define the ratio of the effective overlapping space to the overlapping space is defined as the degree of overlap;

Step 4: Analyze the mapping relationship between the spatial overlap of tobacco leaf material and liquid and process parameters, adjust the relevant process parameters, determine the parameter conditions such as solid phase and liquid phase, and extract the envelope of the atomization area to obtain the distribution of atomized particles.

Preferably, described step1, defines the overlapping area of the tobacco leaf feed liquid in the drum as the overlapping space. From a geometrical point of view, the overlapping space is the intersection Vcd of the tobacco leaf spatial distribution volume Vyy and the feed liquid space distribution volume Vly in the drum, that is:

Vcd=Vyy∩Vly

Preferably, in the step 2, the real space actually occupied by the tobacco leaves in the overlapping space when the tobacco leaf feed liquid is coupled and blended is defined as the effective overlapping space. According to the above definition, the effective overlapping space Vyx of the tobacco leaf feed liquid in the drum is, The volume Vyy of the space actually occupied by the tobacco leaves in the liquid space, namely:

Vyx=Vyy∈Vcd

Preferably, in the step 3, the ratio of the effective overlapping space to the overlapping space is defined as the overlapping degree; according to the above definition, the overlapping degree Rcd is the space volume Vyy actually occupied by the tobacco leaves in the feed liquid space, and the overlapping space volume Vcd. ratio, that is:

Rcd=Vyx/Vcd×100%

Preferably, in the step 4, the mapping relationship between the spatial overlap of the tobacco leaf feed and liquid and the process parameters is analyzed, and the relevant process parameters are adjusted to determine the parameter conditions such as the solid phase and liquid phase, and the enveloping volume is extracted from the atomized area to obtain the atomized particles. distribution, the specific operation process is as follows:

(3) According to the distribution of atomized particles, each atomization section is enveloped by a curve, and then an envelope is formed, and then intersected with the envelope surface of the tobacco leaf particles to obtain an overlapping spatial envelope of the effective mixture. The overlapping spatial envelope The shape changes with different injection conditions. By obtaining five sets of overlapping spaces, each working condition and envelope state are studied and analyzed;

Determine the sampling interval to count the effective overlap space value of the characteristic tobacco leaf group in a motion unit cycle. The tobacco leaf flow increases, and the number of tobacco leaves in the envelope increases. With the deviation of the injection position, although the number of tobacco leaves in the grid does not change much at different times , but the number of tobacco leaves in the overall envelope has a decreasing trend.

Beneficial effects of the present invention:

The present invention provides a reasonable and clear evaluation index when analyzing the mixing effect of the tobacco leaf material and liquid. First, the overlapping area of the tobacco leaf material liquid in the drum is defined as the overlapping space. The real space occupied is the effective overlapping space and the ratio of the effective overlapping space to the overlapping space is defined as the degree of overlap, and the description formula is given respectively. Secondly, since the overlapping space is determined by the tobacco leaf movement space and the material liquid distribution space, the overlapping space and the effective overlapping space It is also directly related to various process parameters that affect the movement of tobacco leaves and the distribution of material and liquid. Through analysis, it can be determined that the overlapping space and effective overlapping space indicators are effective evaluation indicators, and are important innovative process indicators with direct application value. Compared with the prior art, the present invention mainly solves the phenomenon of lack of suitable evaluation indexes when the tobacco leaf feed liquid is coupled and mixed. By adjusting the relevant process parameters, a reasonable, effective and optimized overlapping space and an effective overlapping space state can be obtained, and further Improve and optimize mixing results.

Description of drawings

Fig. 1 is the schematic diagram of the envelope space of tobacco leaf throwing in the drum of the present invention;

Fig. 2 is the spatial schematic diagram of atomization distribution of feed liquid (characteristic particle size) in the drum of the present invention;

Fig. 3 is the overlapping schematic diagram of the distribution space of tobacco leaf and feed liquid (effective particle size) in the drum of the present invention;

Figure 4 is a schematic diagram of the intersection of the spatial overlapping area of the tobacco leaves and the feed liquid (effective particle size) distribution in the drum;

Fig. 5 is the overlapping space schematic diagram of tobacco leaf feed liquid distribution in the drum under a certain process parameter state of the present invention;

Fig. 6 is the schematic diagram of atomization area envelope extraction of the present invention;

Fig. 7 is the overlapping spatial structure diagram of the present invention under the condition of pressure 1.5bar temperature 55 flow rate 30 angle left 15 downward 4 roller inclination angle 1.5;

Fig. 8 is the overlapping spatial structure diagram of the present invention under the condition of pressure 1.5bar temperature 55 flow rate 30 angle left 21 downward 4 roller inclination angle 1.5;

Fig. 9 is the overlapping spatial structure diagram of the present invention under the condition of pressure 1.5bar temperature 55 flow rate 30 angle leftward 25 downwards 4 roller inclination angle 1.5;

Fig. 10 is the overlapping spatial structure diagram of the present invention under the condition of pressure 2.5bar temperature 55 flow rate 30 angle left 21 downward 4 roller inclination angle 1.5;

Fig. 11 is the overlapping spatial structure diagram of the present invention under the condition of pressure 3.5 bar temperature 55 flow rate 30 angle to left 21 downward 4 roller inclination angle 1.5 parameters.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples, but the examples are not intended to limit the present invention.

Embodiment 1: as shown in the accompanying drawings, a kind of method based on the overlapping space and overlapping degree of tobacco leaf feed liquid, and the concrete steps of the method are as follows:

The invention first defines the overlapping area of the tobacco leaf material liquid in the drum as the overlapping space, and the real space actually occupied by the tobacco leaves in the overlapping space when the tobacco leaf material liquid is coupled and mixed is defined as the effective overlapping space and the ratio of the effective overlapping space to the overlapping space. is the overlapping degree. Figure 1-5 is a schematic diagram of the geometric topology relationship of the overlapping space and the formation of the overlapping space under a certain process parameter state, which shows the overlapping space and the effective overlapping space when the tobacco leaves and the material and liquid are mixed. Secondly, since the overlapping space is determined by the tobacco leaf movement space and the material-liquid distribution space, the overlapping space and the effective overlapping space are also directly related to various process parameters that affect the tobacco leaf movement and material-liquid distribution. Through analysis, the overlapping space and effective overlapping space indicators can be determined It is an effective evaluation index and an important innovative process index with direct application value. Compared with the existing methods, the evaluation method mainly solves the phenomenon of lack of suitable evaluation indicators when the tobacco leaf feed is coupled and mixed. By analyzing and adjusting the relevant process parameters, a reasonable, effective and optimized overlap space and effective overlap space can be obtained. state, obtain the right degree of overlap, and then improve and optimize the mixing effect.

Referring to Fig. 6-11, the research and analysis process based on the spatial overlap of tobacco leaf feed liquid and the mapping relationship of process parameters proposed by the present invention is as follows:

This part of the research uses a 0.8m drum to obtain the specific numerical table of the index of the spatial overlap of tobacco leaf material and liquid under different parameters of solid phase (parameters such as drum rotation speed, tobacco leaf flow) and liquid phase (different pressure, angle and other parameters) parameters. The change situation is mainly through the extraction of the envelope surface of the liquid phase (feed liquid) atomization area and the envelope surface of the solid phase (tobacco leaf) throwing area to form the overlapping envelope area of the tobacco leaf material and liquid, and the overlapped part (effective mixing area) is calculated. material area) tobacco leaf (granule) data (volume).

(1) Envelope extraction of atomized area

First, the envelope extraction is performed on the atomization area. The distribution of atomized particles is shown in Figure 6 below. Left 21 Down 4 Roller Inclination 1.5, Pressure 1.5bar Temperature 55 Flow 30 Angle Left 25 Down 4 Roller Inclination 1.5, Pressure 2.5bar Temperature 55 Flow 30 Angle Left 21 Down 4 Roller Inclination 1.5, Pressure 3.5bar Temperature 55 flow 30 angle left 25 down 4 roller inclination 1.5.

(2) Overlapping space

According to the distribution of atomized particles, each atomized section is enveloped by a curve, and then an envelope is formed, and then intersected with the envelope surface of tobacco particles to obtain an overlapping space envelope of effective mixture. The shape of the overlapping space envelope varies with different injection conditions. The working conditions and envelope states are shown in Figures 7-11.

a. The first set of overlapping spaces

Nozzle parameter group 1: pressure 1.5bar, temperature 55, flow 30, angle left 15 down 4. Drum parameters: diameter 0.8 meters, inclination angle 1.5, long nails, rotation speed 9, 11, 13rpm. Tobacco parameters: tobacco flow 60, 70, 80. For this group of parameters, the nozzle sprays the liquid to form a liquid space. The change of the parameters of the roller and tobacco leaves will form 9 different envelope spaces of tobacco leaves, therefore, there will be 9 different overlapping space situations, and Figure 7 shows one of the overlapping space situations.

b. The second set of overlapping spaces

Nozzle parameter group 2: pressure 1.5bar temperature 55 flow 30 angle left 21 down 4. Drum parameters: diameter 0.8 meters, inclination angle 1.5, long nails, rotation speed 9, 11, 13rpm. Tobacco parameters: tobacco flow 60, 70, 80. For this group of parameters, the nozzle sprays the liquid to form a liquid space. The change of the parameters of the roller and tobacco leaves will form 9 different envelope spaces of tobacco leaves, therefore, there will be 9 different overlapping space situations, and Figure 8 shows one of the overlapping space situations.

c. The third set of overlapping spaces

Nozzle parameter group 3: pressure 1.5bar temperature 55 flow 30 angle left 25 down 4. Drum parameters: diameter 0.8 meters, inclination angle 1.5, long nails, rotation speed 9, 11, 13rpm. Tobacco parameters: tobacco flow 60, 70, 80. For this group of parameters, the nozzle sprays the liquid to form a liquid space. The change of the parameters of the roller and tobacco leaves will form 9 different envelope spaces of tobacco leaves, therefore, there will be 9 different overlapping space situations, and Figure 9 shows one of the overlapping space situations.

d. The fourth set of overlapping spaces

Nozzle parameter group 4: pressure 2.5bar temperature 55 flow 30 angle left 21 down 4. Drum parameters: diameter 0.8 meters, inclination angle 1.5, long nails, rotation speed 9, 11, 13rpm. Tobacco parameters: tobacco flow 60, 70, 80. For this group of parameters, the nozzle sprays the liquid to form a liquid space. The change of the parameters of the roller and tobacco leaves will form 9 different envelope spaces of tobacco leaves, therefore, there will be 9 different overlapping space situations, and Figure 10 shows one of the overlapping space situations.

e. Fifth group of overlapping spaces

Nozzle parameter group 5: pressure 3.5bar temperature 55 flow 30 angle left 21 down 4. Drum parameters: diameter 0.8 meters, inclination angle 1.5, long nails, rotation speed 9, 11, 13rpm. Tobacco parameters: tobacco flow 60, 70, 80. For this group of parameters, the nozzle sprays the liquid to form a liquid space. The change of the parameters of the roller and tobacco leaves will form 9 different envelope spaces of tobacco leaves, therefore, there will be 9 different overlapping space situations, and Figure 11 shows one of the overlapping space situations.

Through the observation of the above envelope, it can be found that the envelope volume gradually decreases, and the envelope diameter also decreases gradually. In order to obtain the change of envelope volume more intuitively, the specific volume under each working condition is shown in Table 1. . It can be seen from the table that the larger the deviation of the injection position, the smaller the envelope volume, and the larger the injection pressure at the same injection position, the smaller the envelope volume.

Table 1 Envelope volume values under different working conditions

(3) Effective overlapping space

A data sampling interval of 0.05 seconds was used to count the effective overlapping space values of the characteristic tobacco leaf groups in one motion unit period. The following table shows the statistics of the calculated data under a typical process parameter condition.

Table 2 Valid Overlap Space Values

From the above table, it can be seen that the tobacco leaf flow increases, and the number of tobacco leaves in the envelope increases. With the deviation of the injection position, although the number of tobacco leaves in the grid does not change much at different times, the number of tobacco leaves in the overall envelope has a decreasing trend.

The specific embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, and within the scope of knowledge possessed by those of ordinary skill in the art, it can also be done without departing from the purpose of the present invention. various changes.

Claims (5)

1. A method based on the representation of the overlapping space and the overlapping degree of tobacco feed liquid is used for coupling and mixing the tobacco feed liquid, and is characterized in that: the method for expressing the overlapping space and the overlapping degree of the tobacco feed liquid is realized by adopting the following steps:

step1, defining the overlapping area of the tobacco leaf feed liquid in the roller as an overlapping space;

step2, defining the real space actually occupied by the tobacco leaves in the overlapping space when the tobacco leaf feed liquid is coupled and mixed as the effective overlapping space;

step3, defining the ratio of the effective overlapping space to the overlapping space as the overlapping degree;

step4, analyzing the mapping relation between the space overlapping degree of the tobacco feed liquid and the process parameters, adjusting the relevant process parameters, determining the parameter conditions of solid phase, liquid phase and the like, and extracting the enveloping body of the atomizing area, thereby obtaining the distribution condition of the atomizing particles.

2. The method according to claim 1, wherein the method comprises the following steps: step1, the overlapping area of tobacco leaf feed liquid in the roller is defined as the overlapping space from the geometrical angle, the overlapping space is the intersection Vcd of the tobacco leaf space distribution volume Vyy and the feed liquid space distribution volume Vly in the roller, namely:

Vcd＝Vyy∩Vly。

3. the method according to claim 1, wherein the method comprises the following steps: step2, the real space that is actually taken up by the tobacco leaf in the overlapping space when the tobacco leaf feed liquid carries out the coupling compounding is defined as effective overlapping space, according to the above definition, effective overlapping space Vyx of tobacco leaf feed liquid in the cylinder is, the space volume size Vyy that the tobacco leaf actually took up in the feed liquid space, promptly:

Vyx＝Vyy∈Vcd。

4. the method according to claim 1, wherein the method comprises the following steps: step3, defining the ratio of effective overlapping space and overlapping space as the overlapping degree; according to the above definition, the overlapping degree Rcd is the ratio of the actual occupied space volume Vyy of the tobacco leaves in the feed liquid space to the overlapping space volume Vcd, that is:

Rcd＝Vyx/Vcd×100％。

5. the method according to claim 1, wherein the method comprises the following steps: step4, analyzing the mapping relation between the space overlapping degree of the tobacco feed liquid and the process parameters, adjusting the relevant process parameters, determining the parameter conditions of solid phase and liquid phase and the like, and extracting the enveloping body of the atomizing area, thereby obtaining the distribution condition of the atomizing particles, wherein the specific operation flow is as follows:

(1) carrying out curve enveloping on each atomizing section according to the distribution condition of atomizing particles to form an enveloping body, then intersecting with the enveloping surface of tobacco particles to obtain an overlapping space enveloping body of the effective mixed material, wherein the shape of the overlapping space enveloping body changes along with the difference of spraying conditions, and researching and analyzing each working condition and enveloping state by obtaining five groups of overlapping spaces;

(2) and determining a sampling interval to count the increase of the tobacco flow of the effective overlapping space value of the characteristic tobacco group in one motion unit period, increasing the tobacco number in the enveloping body, and decreasing the tobacco number of the overall enveloping although the tobacco number in the grids does not change greatly at different moments along with the deviation of the spraying position.

Images