A method and system for controlling moisture addition in a conditioning machine

Abstract

The application discloses a moisture regaining machine water adding amount control method, which comprises the following steps: dividing each batch of material into several equal parts with equal weight; storing the corresponding correction water adding amount and characteristic time of the processed equal part material in each batch in the form of a data group; setting several batches processed before the current batch to be processed as historical processing batches, and setting corresponding weights for each historical processing batch; calling each data group with the same characteristic time as the current batch to be processed as a target data group; and bringing the correction water adding amount in each target data group and the weight of each historical processing batch corresponding to each target data group into a weighted model to calculate the water adding amount of the current batch to be processed. The application can calculate the water adding amount of the tobacco material before the tobacco material enters the moisture regaining machine, and can improve the water adding amount accuracy of the tobacco material. The application further discloses a moisture regaining machine water adding amount control system.

Description

Technical Field

[0001] This invention relates to the field of tobacco processing technology, and in particular to a method and system for controlling the amount of water added to a rehumidifier. Background Technology

[0002] In the cigarette manufacturing process, loosening and rehydration is an essential and indispensable step. Loosening and rehydration involves feeding the shredded tobacco into a drum, where rakes inside the drum tear and disperse the tobacco, and water is added. Under the action of process water and steam, the tobacco becomes softer and more pliable, which is beneficial for subsequent processing steps.

[0003] In existing technologies, an infrared moisture meter located at the outlet of the rehumidifier is commonly used to detect the moisture content of the tobacco, i.e., to determine the moisture content at the outlet of the tobacco, thereby assessing the rehumidification effect. The automatic control program compares the moisture content value fed back by the infrared moisture meter with a preset moisture content value, and adjusts the amount of water added to the rehumidifier for subsequent batches of tobacco using PID calculations, thus controlling the moisture content of the tobacco. However, because the water addition mechanism of the rehumidifier is located in the first 1 / 3 of the cylinder, and the infrared moisture meter is located at the outlet of the rehumidifier, there is a lag in the water addition adjustment. Furthermore, the moisture content of two batches of tobacco before entering the rehumidifier may differ significantly. The amount of water required to reach a uniform process standard moisture content varies between batches with different moisture contents. Therefore, judging the water addition amount for the next batch by detecting the outlet moisture content of the previous batch of tobacco will result in inaccurate water addition, affecting the quality of the tobacco. Summary of the Invention

[0004] The purpose of this invention is to solve the technical problems of current rehumidifiers' lag, inaccuracy, and negative impact on tobacco quality when adjusting the amount of water added. This invention provides a method and system for controlling the amount of water added in a rehumidifier, which can calculate the amount of water added to the tobacco before it enters the rehumidifier, improving the accuracy of the water addition and thus enhancing the quality of the tobacco.

[0005] To address the aforementioned technical problems, the present invention discloses a method for controlling the water addition of a rehumidifier, wherein batches of material enter the rehumidifier sequentially with equal flow rates. The control method includes:

[0006] Each batch of material is divided into several equal parts of equal weight, and each part of material is fed into the rehumidification machine for processing in sequence;

[0007] The corrected water addition amount and characteristic time corresponding to the processed equal parts of materials in each batch are stored in the control system of the rehumidifier in the form of data sets;

[0008] Set the batches processed before the current batch to be processed as historical batches and assign corresponding weights to each historical batch.

[0009] Retrieve data sets from each historical processing batch that share the same characteristic time as the current batch of material to be processed as the target data set;

[0010] The corrected water addition amount in each target data group and the weight of each historical processing batch corresponding to each target data group are brought into the weighted model to calculate the water addition amount of the current batch of material to be processed.

[0011] Alternatively, the weighted model is:

[0012]

[0013] Where y is the amount of water added to the current batch of material to be processed, and x j f represents the corrected water addition amount in the j-th target data set. j Let be the weight of the historical processing batch corresponding to the j-th target data group, where j = 1, 2, ..., n, and n is the number of target data groups.

[0014] Optionally, the weight of the historical processing batch adjacent to the current batch to be processed is 50%, and the weight of each of the remaining historical processing batches is 0.5%. Where m is the batch number of historical processing batches.

[0015] Optionally, the six batches processed before the current batch to be processed can be set as historical processing batches, with the weight of the historical processing batch adjacent to the current batch to be processed being 50%, and the weight of each of the other historical processing batches being 10%.

[0016] Optionally, the control system is equipped with a timer. When the first equal portion of material in each batch reaches the inlet of the rehumidifier, the timer count is reset to zero. Subsequently, the timer counts the batch of material entering the rehumidifier. The time taken for each equal portion of material to reach the inlet of the rehumidifier is the characteristic time of each equal portion of material.

[0017] Optionally, each batch of material weighs 2000 kg, and each equal portion of material weighs 200 kg.

[0018] Optionally, when the current batch of material to be processed reaches the inlet of the rehumidifier, the water adding mechanism inside the rehumidifier adds water at a rate corresponding to the current batch of material to be processed.

[0019] Optionally, the corrected water addition amount of an equal portion of material is obtained based on the initial moisture content, outlet moisture content, target moisture content, actual water addition amount of the rehumidifier to the equal portion of material, and the correction model; wherein, the initial moisture content is the moisture content of the equal portion of material before entering the rehumidifier, the outlet moisture content is the moisture content of the equal portion of material when flowing out of the rehumidifier, and the target moisture content is the ideal moisture content of the equal portion of material required in the process.

[0020] Optionally, the model can be modified as follows:

[0021]

[0022] Where a is the initial moisture content of an equal portion of material, b is the target moisture content of the equal portion of material, c is the actual amount of water added by the rehumidifier to the equal portion of material, d is the outlet moisture content of the equal portion of material, and z is the corrected amount of water added to the equal portion of material.

[0023] Optionally, an inlet moisture meter is provided at the inlet of the rehumidifier to detect the initial moisture content, and an outlet moisture meter is provided at the outlet of the rehumidifier to detect the outlet moisture content.

[0024] The present invention discloses a water supply control system for a rehumidifier, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to cause the at least one processor to perform any of the aforementioned water supply control methods for a rehumidifier.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This invention establishes multiple target data groups and calculates the amount of water to be added to the current batch of material to be processed based on the corrected water addition amount in each target data group, the weight of each historical processing batch corresponding to each target data group, and a weighted model. This allows the water addition amount of the current batch of material to be processed to be calculated before it enters the rehumidifier, thereby avoiding the problem of delayed water addition adjustment of tobacco in the existing technology and effectively improving the accuracy of water addition, thus improving the quality of tobacco. Attached Figure Description

[0027] Figure 1 This diagram shows a flowchart of the water addition control method for a rehumidifier provided in an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of a dehumidifier provided in an embodiment of the present invention is shown.

[0029] Reference numerals in the attached diagram: 1. Rehumidifier; 11. Inlet; 12. Outlet; 2. Feed conveyor; 3. Discharge conveyor; 4. Electronic scale; 5. Inlet moisture meter; 6. Outlet moisture meter. Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0031] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0034] The present invention discloses a method for controlling the water addition of a rehumidifier, wherein the structure of the rehumidifier 1 is as follows: Figure 2 As shown, the rehumidifier has an inlet 11 and an outlet 12, and the material is conveyed in the following direction: Figure 2The X direction is shown in the diagram. A feeding conveyor 2 is located at the front of the inlet 11, and a discharging conveyor 3 is located at the rear of the outlet 12. The feeding conveyor 2 transports the material from the previous process to the rehumidifier 1. After processing by the rehumidifier 1, the material is transported to the next process by the discharging conveyor 3. Specifically, the material described in this embodiment is tobacco raw material (e.g., tobacco leaves or stems). Each batch of material enters the rehumidifier 1 sequentially, and the flow rate of each batch is equal.

[0035] refer to Figure 1 The water addition control method for the rehumidifier provided in this embodiment includes:

[0036] Step S1: Divide each batch of material into several equal parts of equal weight, and each part of material enters the rehumidification machine for processing in sequence;

[0037] Step S2: Store the corrected water addition amount and characteristic time corresponding to the processed equal parts of materials in each batch in the control system of the rehumidifier in the form of data sets;

[0038] Step S3: Set the batches processed before the current batch to be processed as historical batches and assign corresponding weights to each historical batch.

[0039] Step S4: Retrieve data sets from each historical processing batch that have the same characteristic time as the current batch of material to be processed as the target data set;

[0040] Step S5: Input the corrected water addition amount in each target data group and the weight of each historical processing batch corresponding to each target data group into the weighted model to calculate the water addition amount of the current batch of material to be processed.

[0041] Specifically, the batch of material to be processed is the current batch to be processed. After calculating the amount of water to be added to the current batch of material to be processed using a weighted model, the rehumidifier will add water to the current batch of material to be processed according to this amount of water. That is, the amount of water added to the current batch of material to be processed is the actual amount of water added to the current batch of material to be processed.

[0042] This invention establishes target data groups and calculates the amount of water to be added to the current batch of material to be processed based on the corrected water addition amount in each target data group, the weight of each historical processing batch corresponding to each target data group, and a weighted model. This allows the amount of water to be added to the current batch of material to be processed to be calculated before it enters the rehumidifier, thereby avoiding the problem of delayed water addition adjustment of tobacco in the prior art and effectively improving the accuracy of water addition, thus improving the quality of tobacco.

[0043] Furthermore, the weighted model is as follows:

[0044]

[0045] Where y is the amount of water added to the current batch of material to be processed, and x j f represents the corrected water addition amount in the j-th target data set. j Let be the weight of the historical processing batch corresponding to the j-th target data group, where j = 1, 2, ..., n, and n is the number of target data groups.

[0046] Furthermore, the weight of the historical processing batch adjacent to the current batch to be processed is 50%, and the weight of each of the remaining historical processing batches is 0.5%. Where m is the number of historical processing batches. For example, the 6 batches processed before the current batch are historical processing batches, with the weight of the historical processing batch adjacent to the current batch being 50%, and the weight of each of the remaining historical processing batches being 10%.

[0047] Furthermore, when the current batch of material to be processed reaches the inlet of the rehumidifier, the water adding mechanism inside the rehumidifier adds water in an amount corresponding to the current batch of material to be processed.

[0048] Furthermore, the control system is equipped with a timer. When the first portion of material in each batch reaches the entrance of the rehumidifier, the timer count is reset to zero. Subsequently, the timer counts the batch of material entering the rehumidifier. The time taken for each portion of material to reach the entrance of the rehumidifier is the characteristic time of each portion of material.

[0049] For example, each batch of material weighs 2000 kg, and each equal portion of material weighs 200 kg.

[0050] Furthermore, the corrected water addition amount for an equal portion of material is obtained based on the initial moisture content, outlet moisture content, target moisture content, actual water addition amount by the rehumidifier for the equal portion of material, and the correction model; wherein, the initial moisture content is the moisture content of the equal portion of material before entering the rehumidifier, the outlet moisture content is the moisture content of the equal portion of material when flowing out of the rehumidifier, and the target moisture content is the ideal moisture content for the equal portion of material required in the process.

[0051] Furthermore, the model is revised as follows:

[0052]

[0053] Where a is the initial moisture content of an equal portion of material, b is the target moisture content of the equal portion of material, c is the actual amount of water added by the rehumidifier to the equal portion of material, d is the outlet moisture content of the equal portion of material, and z is the corrected amount of water added to the equal portion of material.

[0054] Furthermore, such as Figure 1As shown, an inlet moisture detector 5 is provided at the inlet 11 of the rehumidifier 1. The inlet moisture detector 5 is used to detect the initial moisture content. An outlet moisture detector 6 is provided at the outlet 12 of the rehumidifier 1. The outlet moisture detector 6 is used to detect the moisture content at the outlet 12.

[0055] To enable those skilled in the art to easily understand the above technical solutions, the following embodiment will be used to illustrate the above technical solutions in detail.

[0056] In this embodiment, batches of material enter the rehumidifier 1 sequentially with equal flow rates. Each batch weighs 2000 kg. Specifically, the control system divides each batch into 10 equal portions, each weighing 200 kg. These portions then enter the rehumidifier 1 sequentially for processing. An electronic scale 4 is installed at the inlet 11 of the rehumidifier 1. Figure 2 As shown, the electronic scale 4 can weigh each batch of material entering the rehumidifier 1. When the cumulative weight of the electronic scale 4 reaches 200kg, the electronic scale 4 sends a signal to the control system, and the control system records this portion of material entering the rehumidifier 1 as an equal portion of material. In this embodiment, since the flow rate of each batch of material entering the rehumidifier 1 is equal, and the weight of the material entering the inlet 11 within the same time period is equal, this embodiment can also determine the equal portions of material entering the rehumidifier 1 by using a timer set in the controller, and transmit the characteristic time of each equal portion of material to the processor. Specifically, when the first equal portion of material in each batch reaches the inlet 11 of the rehumidifier 1, the timer count is reset to zero. Subsequently, the timer counts the batch of material entering the rehumidifier 1, and the time taken for each equal portion of material in that batch to reach the inlet 11 is the characteristic time of that equal portion of material.

[0057] In addition, the control system needs to substitute the initial moisture content, outlet moisture content, target moisture content, and actual water addition by the rehumidifier for each processed portion of material into the aforementioned correction model to calculate the corrected water addition for each processed portion of material. Specifically, the inlet moisture detector 5 can detect the material running to inlet 11 to obtain the initial moisture content of this portion of material; the outlet moisture detector 6 can detect the material running to outlet 12 to obtain the outlet moisture content of this portion of material; the target moisture content can be set according to process requirements; the actual water addition for each portion of material can be obtained based on the actual water addition by the rehumidifier 1 for each portion of material.

[0058] After obtaining the corrected water addition amount and characteristic time of each processed equal portion of material in each batch, the corrected water addition amount and characteristic time corresponding to each processed equal portion of material in each batch are stored in the control system of the rehumidifier in the form of data groups. Several batches processed before the current batch to be processed are set as historical processing batches, and corresponding weights are assigned to each historical processing batch.

[0059] Table 1 shows the data group statistics for this embodiment. In this embodiment, batch 13 is the current batch to be processed, and batches 7 to 12 (a total of 6 batches) are historical processing batches. Among them, the weight of batches 7 to 11 is 10% each (i.e., f7, f8, f9, f10). 10 f 11 All are 10%), and the weight of the 12th batch is 50% (i.e., f). 12 (50%). The data sets for each fraction of material are shown in Table 1, where x ij t represents the corrected water addition amount in the data set corresponding to the i-th portion of material in the j-th historical processing batch. j Let i be the characteristic time corresponding to the i-th equal portion of material in each processing batch; where i = 1, 2, ..., m, m is the quantity of equal portions of material in each historical processing batch; j = 1, 2, ..., n, n is the quantity of material batches.

[0060] Table 1. Statistical Table of Data Sets

[0061]

[0062] After statistically analyzing the data sets of each portion of material in the historical processing batches, the data sets with the same characteristic time in each historical processing batch are retrieved as the target data sets. Specifically, in this embodiment, the first portion of material in the 13th batch is taken as the current portion to be processed, and its water addition is calculated. Since the characteristic time of the first portion of material in the 13th batch is t1, all data sets with characteristic time t1 are used as the target data sets. Since the flow rate of each batch of material is equal in this embodiment, and the timer count needs to be reset to zero when the first portion of material in each batch reaches the inlet 11 of the rehumidifier 1, and then the timer starts timing the batch of material entering the rehumidifier 1, the characteristic times of the same portion of material in each batch are equal. Therefore, the data sets with characteristic time t1 are all the data sets of the first portion of material in each historical processing batch. That is, the data sets of the first portion of material in each historical processing batch are used as the target data sets, so the number of target data sets is equal to the number of historical processing batches.

[0063] Subsequently, the corrected water addition (x) for each historical processing batch corresponding to the target data set will be calculated. ij) and the weights (t) of each historical processing batch corresponding to the target data set. j Substitute this into the weighted model to calculate the amount of water added to the first equal portion of material in the 13th batch.

[0064] Right now:

[0065]

[0066] Among them, y 113 This refers to the amount of water added to the first portion of material in the 13th batch.

[0067] The control system will y 113 The actual amount of water added as the first equal portion of material in the 13th batch; at the same time, y 113 It will also be included in the correction model to calculate the corrected water addition amount for the first equal part of material in the 13th batch. This corrected water addition amount will be used to calculate the water addition amount for subsequent batches to be processed.

[0068] Furthermore, when the current batch of material to be processed reaches the inlet of the rehumidifier, the water-adding mechanism inside the rehumidifier adds water at a rate corresponding to the current batch of material to be processed. This allows the water-adding amount of the current batch of material to be processed to be adjusted before it enters the rehumidifier, thus avoiding the problem of lag in the water-adding amount adjustment of tobacco in the prior art.

[0069] It should be noted that if the six batches processed before the current batch are considered historical batches, then the first six batches of material entering the rehumidifier when it is first turned on will not have corresponding historical batches. Therefore, the amount of water added to these first six batches cannot be calculated using a weighted model, and must be determined based on experience. In this embodiment, the actual amount of water added to the first six batches is set to 4.5 kg / 100 kg, meaning the rehumidifier adds 4.5 kg of process water to every 100 kg of material. Simultaneously, the control system can use this actual amount of water added to the correction model to calculate the corrected amount of water added to each portion of material in the first six batches. After obtaining the corrected amount of water added to each portion of material in the first six batches, the amount of water added to each portion of material can be calculated using a weighted model starting from the seventh batch.

[0070] The present invention discloses a water supply control system for a rehumidifier, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to cause the at least one processor to perform any of the aforementioned water supply control methods for a rehumidifier.

[0071] While the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the invention to these descriptions. Various changes in form and detail can be made by those skilled in the art, including several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims

1. A method for controlling the water addition of a rehumidifier, characterized in that, Each batch of material enters the rehumidifier sequentially with equal flow rates. The control method includes: Each batch of material is divided into several equal portions of equal weight, and each portion of material is sequentially fed into the rehumidification machine for processing. The corrected water addition amount and characteristic time corresponding to the processed equal portions of material in each batch are stored in the control system of the rehumidifier in the form of data groups. The control system is equipped with a timer. When the first equal portion of material in each batch runs to the entrance of the rehumidifier, the count of the timer is reset to zero. Subsequently, the timer counts the batch of material entering the rehumidifier. The time for each equal portion of material to run to the entrance of the rehumidifier is the characteristic time of each equal portion of material. Set several batches processed before the current batch to be processed as historical processing batches, and assign corresponding weights to each of the historical processing batches; Retrieve the data groups from each of the historical processing batches that have the same characteristic time as the material to be processed in the current batch as the target data group; The corrected water addition amount in each of the target data groups and the weight of each historical processing batch corresponding to each of the target data groups are brought into the weighted model to calculate the water addition amount of the current batch of material to be processed. The weighted model is as follows: Where y is the amount of water added to the current batch of material to be processed, xj is the corrected amount of water added in the j-th target data group, fj is the weight of the historical processing batch corresponding to the j-th target data group, j=1,2……n, and n is the number of target data groups; The weight of the historical processing batch adjacent to the current batch to be processed is 50%, and the weight of each of the remaining historical processing batches is 0.5%. , where m is the batch number of the historical processing batch; The corrected water addition amount for an equal portion of material is obtained based on the initial moisture content, outlet moisture content, target moisture content, actual water addition amount by the rehumidifier, and a correction model; wherein, the initial moisture content is the moisture content of the equal portion of material before entering the rehumidifier, the outlet moisture content is the moisture content of the equal portion of material when flowing out of the rehumidifier, and the target moisture content is the ideal moisture content required for the equal portion of material in the process; The corrected model is as follows: Where a is the initial moisture content of an equal portion of material, b is the target moisture content of the equal portion of material, c is the actual amount of water added by the rehumidifier to the equal portion of material, d is the outlet moisture content of the equal portion of material, and z is the corrected amount of water added to the equal portion of material.

2. The method for controlling the water addition of a rehumidifier as described in claim 1, characterized in that, The six batches processed before the current batch to be processed are designated as the historical processing batches. The weight of the historical processing batch adjacent to the current batch to be processed is 50%, and the weight of each of the other historical processing batches is 10%.

3. The method for controlling the water addition of a rehumidifier as described in claim 1, characterized in that, Each batch of material weighs 2000 kg, and each portion of the material weighs 200 kg.

4. The method for controlling the water addition of a rehumidifier as described in claim 1, characterized in that, When the current portion of material to be processed reaches the inlet of the rehumidifier, the water adding mechanism inside the rehumidifier adds water at a rate corresponding to the amount of water added to the current portion of material to be processed.

5. The method for controlling the water addition of a rehumidifier as described in claim 1, characterized in that, The rehumidifier is equipped with an inlet moisture meter at its inlet, which is used to detect the initial moisture content. The rehumidifier is also equipped with an outlet moisture meter at its outlet, which is used to detect the outlet moisture content.

6. A water supply control system for a rehumidifier, characterized in that, include: At least one processor; The device includes a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, cause the at least one processor to perform the rehumidifier water addition control method as described in any one of claims 1 to 5.

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