Online monitoring system for moisture of blended tobacco shreds

Abstract

The invention discloses an online monitoring system for moisture of blended tobacco shreds, and the main design concept of the online monitoring system is as follows: moisture meters additionally arranged on a tobacco shred main scale and blending scales are used for detecting instantaneous moisture values of the blended tobacco shreds through the moisture meters and solving an instantaneous moisture mean value; establishing an instantaneous and mean mathematical model of the moisture of the blended tobacco shreds by combining the set flow, instantaneous flow and accumulated flow of the tobacco shred main scale and parameters such as the set flow, instantaneous flow and accumulated flow of the blending scales in proportion, and solving an instantaneous value and a mean value of the moisture of the blended tobacco shreds; and after being compared with a set perfumed process standard value, the water content counteracts the setting of the cut tobacco drying outlet moisture meter, so that the moisture content of the mixed cut tobacco entering the cut tobacco mixing cabinet after blending meets the standard requirement of the process technology by adjusting the moisture content of the cut tobacco drying machine outlet in time.

Description

Technical Field

[0001] The present invention relates to the field of cigarette manufacturing, and in particular to an online monitoring system for moisture content in mixed shredded tobacco after blending. Background Art

[0002] On the cigarette cut tobacco production line, the tobacco after drying will be mixed with stem cuts, air-flow cuts, expanded cuts, thin slices, residual cuts, etc. through various blending scales based on the instantaneous flow rate of the leaf cut main scale and the established proportions required by the process technology. The mixed tobacco after blending enters the main mixing cabinet through auxiliary equipment such as the main mixing belt. After the mixed tobacco enters the cabinet, it will be taken out of the main mixing cabinet and then enter the finished tobacco cabinet after being flavored by the flavoring machine.

[0003] Since the mixed tobacco enters the main mixing cabinet through the mixing belt and auxiliary equipment, the mixing belt and auxiliary equipment do not have the function of fully mixing the blended tobacco, so it is impossible to add a moisture monitoring mechanism to the mixing belt and auxiliary equipment, and it is difficult to monitor the real instantaneous moisture of the mixed tobacco. The subsequent flavoring machine also has no moisture adjustment function. Therefore, how to timely monitor the real instantaneous moisture of the tobacco after mixing on the mixing belt and the real average moisture of the mixed tobacco in the main mixing cabinet, so as to provide a basis for the moisture adjustment of the tobacco drying machine, and then meet the moisture process technical standard requirements of the flavoring machine for tobacco exported, has become one of the key issues of concern to the silk production line. Summary of the Invention

[0004] In view of the above, the present invention aims to provide an online monitoring system for the moisture content of mixed cut tobacco after blending, so as to solve the above-mentioned technical problems.

[0005] The technical solution adopted in the present invention is as follows:

[0006] The present invention provides an online monitoring system for moisture content in mixed tobacco after blending, comprising:

[0007] A moisture meter for the main leaf scale installed on the main leaf scale, a first moisture meter installed at the first blending scale, a second moisture meter installed at the second blending scale, and a third moisture meter installed at the third blending scale;

[0008] The online monitoring system obtains the following four sets of dynamic parameters according to a predetermined time period:

[0009] The first group: the instantaneous cumulative amount of the material ∑0, the instantaneous flow rate Qn0 provided by the main scale of the leaf silk, and the instantaneous moisture content M of the material provided by the moisture meter of the main scale of the leaf silk t0 , average instantaneous moisture content of the material M μ0 ;

[0010] The second group: the instantaneous cumulative amount of material ∑1, the instantaneous flow rate Qn1 of the material provided by the first blending scale, and the instantaneous moisture content M of the material provided by the first moisture meter t1, average instantaneous moisture content of the material M μ1 ;

[0011] The third group: the instantaneous cumulative amount of material ∑2, the instantaneous flow rate Qn2 of the material provided by the second blending scale, and the instantaneous moisture content M of the material provided by the second moisture meter t2 , average instantaneous moisture content of the material M μ2 ;

[0012] The fourth group: the instantaneous cumulative amount of the material ∑3, the instantaneous flow rate Qn3 of the material provided by the third blending scale, and the instantaneous moisture content M of the material provided by the third moisture meter t3 , average instantaneous moisture content of the material M μ3 ;

[0013] The online monitoring system sets the moisture setting value at the tofu drying machine outlet according to the four sets of dynamic parameters, in the reverse order of the post-drying mixing production line process, including:

[0014] The instantaneous moisture content M of the mixed tobacco is obtained by using the four sets of dynamic parameters. t , average moisture content of mixed tobacco M μ ;

[0015] The instantaneous moisture content of mixed tobacco M t , average moisture content of mixed tobacco M μ As a monitoring condition, combined with the preset process standard moisture value M after flavoring 标 The first fluctuation ratio and the preset second fluctuation ratio of the instantaneous moisture content of the mixed tobacco are used to manually or automatically set the moisture setting value M at the outlet of the tobacco drying machine. P .

[0016] In at least one possible implementation, the instantaneous moisture content M of the mixed tobacco is calculated according to the following formula: t :

[0017] .

[0018] In at least one possible implementation, the average moisture content M of the mixed tobacco is calculated according to the following formula: μ :

[0019] .

[0020] In at least one possible implementation, the monitoring condition includes:

[0021] M 标 -The first fluctuation ratio ≤ M μ ≤M 标 + the first fluctuation ratio; and,

[0022] M tThe change in ≤ the preset second fluctuation ratio.

[0023] In at least one possible implementation, the automatic setting of the moisture setting value M at the outlet of the silk drying machine is P include:

[0024] Under the monitoring conditions, according to formula M P = M p0 +(M 标 -M μ ) automatically sets the moisture setting value of the dryer outlet, where M p0 It is the initial setting value of the moisture meter at the outlet of the tofu drying machine.

[0025] In at least one possible implementation, the moisture loss value M of the tobacco cut after drying caused by the leaf winnowing is preset. 损 , and use the following formula to calculate M P Make compensation: M P = M p0 +(M 标 -M μ )+M 损 .

[0026] Compared with the existing technology, the main design concept of the present invention is to use the moisture meters installed on the leaf shred main scale and each blending scale to detect the instantaneous moisture value of each blended tobacco and calculate the instantaneous moisture average through the moisture meters, and then combine the set flow, instantaneous flow, cumulative flow of the leaf shred main scale and the set flow, instantaneous flow, cumulative flow and other parameters of the proportional blending of each blending scale to establish the instantaneous and average moisture of the mixed tobacco after blending and calculate the instantaneous value and average value of the moisture of the mixed tobacco. After comparing with the established process standard value after flavoring, it reacts to the setting of the moisture meter at the drying outlet, so as to timely adjust the moisture at the drying machine outlet to achieve the moisture of the mixed tobacco entering the mixing cabinet after blending meeting the process technical standard requirements.

[0027] In actual application, it is convenient to timely check and pre-regulate the instantaneous and average moisture content of the mixed tobacco entering the total blending cabinet after drying through the MES and IFIX operation desktop during the tobacco production process, so that the moisture content of the mixed tobacco meets the process technical standards after flavoring, avoiding quality accidents caused by the moisture content of the tobacco leaving the total blending cabinet not meeting the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described below with reference to the accompanying drawings, in which:

[0029] Figure 1 A schematic diagram of a post-baking mixing production line used by the online monitoring system provided in an embodiment of the present invention.

[0030] Explanation of the accompanying symbols: 1. Silk drying machine 2. Auxiliary equipment 3. Air separation equipment 4. Auxiliary equipment 5. Silk leaf main scale 6. Total mixed silk belt 7. First blending scale 8. First moisture meter 9. Total mixed silk cabinet 10. Auxiliary equipment for cabinet outlet 11. Fragrance machine 12. Auxiliary equipment 13. Fragrance outlet moisture meter 14. Second moisture meter 15. Second blending scale 16. Third moisture meter 17. Third blending scale 18. Silk leaf main scale moisture meter 19. Silk drying machine outlet moisture meter. DETAILED DESCRIPTION

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] The present invention proposes an embodiment of an online monitoring system for moisture content of mixed tobacco after blending. Specifically, Figure 1 As shown, it includes: a moisture meter 18 for the main leaf scale 5, a first moisture meter 8 for the first blending scale 7, a second moisture meter 14 for the second blending scale 15, and a third moisture meter 16 for the third blending scale 17;

[0033] The four moisture meters mentioned above can be QBTM900 moisture meters, which are used to detect the instantaneous moisture content of the tobacco on the main cut tobacco scale 5 and the corresponding blending scale (and thus obtain the average instantaneous moisture content of the material). The factory MES system scans and reads all data every T seconds (for example, 6 seconds). In other words, the factory MES system reads the following four sets of dynamic parameters at a predetermined time period:

[0034] (1) The instantaneous cumulative amount of material ∑0, the instantaneous flow rate Qn0 of the material provided by the main scale 5, and the instantaneous moisture content M of the moisture meter 18 of the main scale t0 , and the average instantaneous moisture content of the material M μ0 ;

[0035] (2) The instantaneous cumulative amount of material ∑1, the instantaneous flow rate Qn1 of the material provided by the first blending scale 7, and the instantaneous moisture content M of the material provided by the first moisture meter 8 t1 , and the average instantaneous moisture content of the material M μ1 ;

[0036] (3) The instantaneous cumulative amount of material ∑2, the instantaneous flow rate Qn2 of the material provided by the second blending scale 15, and the instantaneous moisture content M of the material provided by the second moisture meter 14 t2 , average instantaneous moisture content of the material M μ2 ;

[0037] (4) The instantaneous cumulative amount of material ∑3, the instantaneous flow rate Qn3 of the material provided by the third blending scale 17, and the instantaneous moisture content M of the material provided by the third moisture meter 16 t3 , average instantaneous moisture content of the material M μ3 ;

[0038] MES can store the above-mentioned data in the corresponding database and simultaneously push the read values ​​to the IFIX operation desktop.

[0039] By using the above four sets of parameters, the online monitoring system provided by the present invention can set the outlet moisture setting value of the tofu drying machine 1 in the previous process in the reverse direction of the post-drying mixing production line in the following manner:

[0040] In advance, in the factory MES system, based on the above indicators, the instantaneous moisture content M of the mixed tobacco entering the main mixing cabinet is established. t , average moisture content M μ The mathematical model is used to calculate the instantaneous moisture content M of the mixed tobacco. t , average moisture content M μ , and you can also t 、M μ The value is pushed to the IFIX operation desktop.

[0041] Specifically, the instantaneous moisture content M of the mixed tobacco entering the main mixing cabinet is established. t :

[0042]

[0043] Establish the average moisture content M of the mixed tobacco entering the main mixing cabinet μ :

[0044]

[0045] The standard moisture requirement after blending and fragrance addition is set to M 标 , and the first fluctuation ratio (tolerance of the standard value) can be ±0.5% (it should be pointed out that the influence of the flavoring amount of the flavoring machine on the moisture content is generally negligible), and then according to the instantaneous moisture content M of the mixed tobacco entering the main mixing cabinet t , average moisture content M μ , manually or automatically reverse the moisture setting value M of the dryer outlet of the previous process P , set conditions: First, the average moisture content of the mixed tobacco is M μ Meet M 标 -0.5%≤M μ ≤M 标 +0.5%; secondly, the instantaneous moisture content of the mixed tobacco is continuously monitored during the setting process. tThat is, when setting the moisture value at the outlet of the tobacco drying machine, it is necessary to ensure that the instantaneous moisture content of the mixed tobacco is M t Stable (can be quantitatively examined based on the set second volatility) and ensure the average moisture content M μ It is within the tolerance range of the process standard value after fragrance addition.

[0046] When the above conditions are set manually, they can be monitored based on personnel experience. For automatic setting, it can be supplemented that the moisture setting value M of the dryer outlet can be established in the factory MES system in advance. P Mathematical model M P = M p0 +(M 标 -M μ ), where M p0 is the initial setting value of the moisture meter 19 at the outlet of the silk drying machine, which is used to adjust the moisture at the outlet of the silk drying machine. t 、M μ The value of M makes the average moisture of the mixed tobacco entering the total mixing cabinet μ Meet M 标 -0.5%≤M μ ≤M 标 +0.5%, and the instantaneous moisture content of the mixed tobacco is M t In a stable state.

[0047] Finally, it can be supplemented that the moisture loss value M of the dried tobacco caused by the air separation device 3 during the air separation of the tobacco leaves can be preset based on expert knowledge. 损 , and accordingly set the reverse M P To compensate, for example, modify the above model to M P = M p0 +(M 标 -M μ )+M 损 .

[0048] To sum up, the main design concept of the present invention is to use the moisture meters installed on the main scale of leaf shreds and each blending scale to detect the instantaneous moisture value of each blended tobacco and calculate the instantaneous moisture average through the moisture meters, and then combine the set flow, instantaneous flow, cumulative flow of the main scale of leaf shreds and the set flow, instantaneous flow, cumulative flow and other parameters of the proportional blending of each blending scale to establish the instantaneous and average moisture value mathematical model of the mixed tobacco shreds after blending and calculate the instantaneous value and average value of the moisture value of the mixed tobacco shreds. After comparing with the established process standard value after flavoring, it reacts to the setting of the moisture meter at the drying outlet, so as to timely adjust the moisture value at the outlet of the drying machine to achieve the moisture content of the mixed tobacco entering the mixing cabinet after blending meeting the process technical standard requirements.

[0049] If the expressions expressing directions are mentioned in the embodiments of the present invention, they are relative concepts based on the embodiments. In addition, "at least one" refers to one or more, and "more" refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can represent: a, b, c, a and b, a and c, b and c or a, b and c, where a, b, c can be single or multiple.

[0050] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings, but the above is only a preferred embodiment of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred modes can be reasonably combined and matched into a variety of equivalent schemes by those skilled in the art without departing from or changing the design ideas and technical effects of the present invention; therefore, the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present invention.

Claims

1. An online monitoring system for moisture content of mixed tobacco after blending, characterized in that: include: A moisture meter for the main leaf scale installed on the main leaf scale, a first moisture meter installed at the first blending scale, a second moisture meter installed at the second blending scale, and a third moisture meter installed at the third blending scale; The online monitoring system obtains the following four sets of dynamic parameters according to a predetermined time period: The first group: the instantaneous cumulative amount of the material ∑0, the instantaneous flow rate Qn0 provided by the main scale of the leaf silk, and the instantaneous moisture content M of the material provided by the moisture meter of the main scale of the leaf silk t0 , average instantaneous moisture content of the material M μ0 ; The second group: the instantaneous cumulative amount of material ∑1, the instantaneous flow rate Qn1 of the material provided by the first blending scale, and the instantaneous moisture content M of the material provided by the first moisture meter t1 , average instantaneous moisture content of the material M μ1 ; The third group: the instantaneous cumulative amount of material ∑2, the instantaneous flow rate Qn2 of the material provided by the second blending scale, and the instantaneous moisture content M of the material provided by the second moisture meter t2 , average instantaneous moisture content of the material M μ2 ; The fourth group: the instantaneous cumulative amount of the material ∑3, the instantaneous flow rate Qn3 of the material provided by the third blending scale, and the instantaneous moisture content M of the material provided by the third moisture meter t3 , average instantaneous moisture content of the material M μ3 ; The online monitoring system sets the moisture setting value at the tofu drying machine outlet according to the four sets of dynamic parameters, in the reverse order of the post-drying mixing production line process, including: The instantaneous moisture content M of the mixed tobacco is obtained by using the four sets of dynamic parameters. t , average moisture content of mixed tobacco M μ ; The instantaneous moisture content of mixed tobacco M t , average moisture content of mixed tobacco M μ As a monitoring condition, combined with the preset process standard moisture value M after flavoring 标 The first fluctuation ratio and the preset second fluctuation ratio of the instantaneous moisture content of the mixed tobacco are used to manually or automatically set the moisture setting value M at the outlet of the tobacco drying machine. P .

2. The online monitoring system for moisture content of blended cut tobacco according to claim 1, characterized in that: The instantaneous moisture content M of the mixed tobacco is calculated according to the following formula: t : 。 3. The online monitoring system for moisture content of blended cut tobacco after blending according to claim 1, characterized in that: The average moisture content M of mixed tobacco can be calculated according to the following formula μ : 。 4. The online monitoring system for moisture content of blended cut tobacco after blending according to claim 1, characterized in that: The monitoring conditions include: M 标 -The first fluctuation ratio ≤ M μ ≤M 标 + the first fluctuation ratio; and, M t The change in ≤ the preset second fluctuation ratio.

5. The online monitoring system for moisture content of blended cut tobacco after blending according to any one of claims 1 to 4, characterized in that: The automatic setting of the moisture setting value M of the dryer outlet P include: Under the monitoring conditions, according to formula M P = M p0 +(M 标 -M μ ) automatically sets the moisture setting value of the dryer outlet, where M p0 It is the initial setting value of the moisture meter at the outlet of the tofu drying machine.

6. The online monitoring system for moisture content of blended cut tobacco according to claim 5, characterized in that: Preset the moisture loss value M of the tobacco cut after drying caused by the winnowing of the cut tobacco leaves 损 , and use the following formula to calculate M P Make compensation: M P = M p0 +(M 标 -M μ )+M 损 .

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