阅读说明：本技术 真空回潮机增湿控制方法 (Humidifying control method for vacuum damping machine ) 是由 付永民 靳亚伟 范磊 马媛媛 牛宏伟 王镀 周逸飞 李长进 王小明 徐晓光 李朝 于 2021-07-15 设计创作，主要内容包括：本发明公开了一种真空回潮机增湿控制方法,本发明的设计构思在于,对不同等级烟叶计算不同的加水量,并可以通过流量计检测增湿环节的实际加水量,控制加水量达到既定标准后再进行破空出箱,从而实现批次内不同等级的烟叶在保障回透率的基础上进行精细加水,使真空回潮机出口水分保持一致,满足松散回潮机入口水分的需要。具体来说,通过计算对应批次类别的加水量,并纳入真空回潮机工作循环控制,结合增湿环节过程中的实测真空度,可以有效降低出口水分波动,提升了批次内水分稳定性,减少了后续加工难度,因此达到加工一致性的目的。本发明操作简单,效果显著,在本领域具有良好的工业应用价值和推广应用前景。(The invention discloses a humidification control method of a vacuum damping machine, which has the design conception that different water adding amounts are calculated for tobacco leaves of different grades, the actual water adding amount in a humidification link can be detected through a flowmeter, the water adding amount is controlled to reach a set standard, and then the tobacco leaves are emptied out of a box, so that the tobacco leaves of different grades in a batch are subjected to fine water adding on the basis of ensuring the moisture regain, the moisture at the outlet of the vacuum damping machine is kept consistent, and the requirement of the moisture at the inlet of a loose damping machine is met. Particularly, by calculating the water adding amount of the corresponding batch type, bringing the water adding amount into the working cycle control of the vacuum dampening machine, and combining the actual measurement vacuum degree in the humidifying link process, the fluctuation of the outlet water can be effectively reduced, the water stability in the batch is improved, the subsequent processing difficulty is reduced, and the purpose of processing consistency is achieved. The method has the advantages of simple operation and obvious effect, and has good industrial application value and popularization and application prospects in the field.)

1. A humidification control method of a vacuum conditioner is characterized by comprising the following steps:

dividing a plurality of raw materials of which the difference between moisture and hygroscopicity in the batch of tobacco leaf formulas conforms to a set minimum difference range into the same circulating working group of the vacuum moisture regaining machine;

acquiring the average value of the moisture of the raw materials in the group as a first inlet moisture parameter of the vacuum damping machine;

taking a preset outlet moisture index of the vacuum damping machine as a second inlet moisture parameter of the loosening damping machine;

calculating the difference between the second inlet moisture parameter and the first inlet moisture parameter;

according to the difference, the total weight of the raw materials in the set and a preset correction coefficient, calculating the target water adding amount of a humidifying link of the vacuum moisture regaining machine;

and in the humidifying process, controlling the water adding operation of the vacuum damping machine in the humidifying link based on the calculated target water adding amount, the calculated actual water adding amount and the vacuum degree in the box of the vacuum damping machine.

2. The humidification control method of the vacuum conditioner as claimed in claim 1, wherein the controlling of the water adding operation of the vacuum conditioner in the humidification step based on the calculated target water adding amount, the actual water adding amount and the vacuum degree in the vacuum conditioner comprises:

in the humidifying process, the actual water adding amount and the vacuum degree in the tank are obtained in real time;

and when the actual water adding amount reaches the target water adding amount and the vacuum degree in the tank is not reduced to a preset vacuum degree threshold value, stopping the humidifying operation and switching to a pressure maintaining link.

3. The humidification control method of the vacuum conditioner as claimed in claim 2, wherein the controlling of the water adding operation of the vacuum conditioner in the humidification step based on the calculated target water adding amount, the actual water adding amount and the vacuum degree in the vacuum conditioner further comprises:

when the vacuum degree in the box is reduced to a preset vacuum degree threshold value and the actual water adding amount does not reach the target water adding amount, suspending the humidifying operation and switching to a first pressure maintaining link;

after the first round of pressure maintaining link is finished, vacuum pumping operation is executed, and when the vacuum degree in the box reaches a preset vacuum degree value, humidification operation is resumed;

when the total amount of the actual water addition amount reaches the target water addition amount, the humidification operation is stopped and the second round of pressure maintaining link is carried out.

4. The humidification control method of a vacuum conditioner according to claim 2 or 3, wherein the pressure maintaining step is performed for a preset time.

5. The humidification control method of a vacuum conditioner according to any one of claims 1 to 3, wherein the actual water addition amount is detected by a flow meter disposed in a water supply line of the vacuum conditioner.

Technical Field

The invention relates to the field of cigarette processing and manufacturing, in particular to a humidification control method of a vacuum moisture regaining machine.

Background

In the tobacco manufacturing and processing process, the vacuum moisture regain process is the first process of tobacco processing, and is used for removing impurity gas from tobacco leaves, increasing the moisture of the tobacco leaves and improving the ductility and the processing resistance of the tobacco leaves. The working process comprises the following steps: evacuating, humidifying, pressure maintaining, back pumping and air breaking. After the turnover box filled with the tobacco leaves enters the box body and locks the box body, the box body of the vacuum moisture regaining machine is pumped out firstly to ensure that vacuum is formed in the box body, and after a certain vacuum degree is reached, steam is used for guiding water to be sprayed into the box body, so that the tobacco leaves can absorb moisture rapidly in a vacuum environment, and the aim of humidifying is fulfilled. After the vacuum degree is reduced to a certain value, the humidification is stopped, the humidity is kept for a period of time, after the tobacco leaves fully absorb moisture, air is injected into the box body, the air pressure inside and outside the box body is balanced, then the box body is opened, a turnover box filled with the tobacco leaves enters the next procedure for loosening and moisture regaining, and the cycle of the vacuum moisture regaining procedure is ended.

The humidification link in the existing working cycle is controlled by the vacuum degree, the water added in each cycle is basically consistent, but the moisture of the tobacco leaves in the batch fluctuates greatly at the outlet of the vacuum moisture regaining machine because the moisture of the supplied materials is inconsistent with the moisture absorption. The moisture of the tobacco leaves at the inlet of the loosening and conditioning machine in the next procedure is unstable, the extremely poor moisture can be 3, the loosening and conditioning machine is extremely difficult to control, and the oscillation phenomenon of the moisture at the outlet is serious. The reason for this phenomenon is that the existing vacuum moisture regaining machine only concerns the moisture regain of tobacco leaves, but does not concern the influence on the subsequent procedures, and does not meet the requirement of fine processing.

Disclosure of Invention

In view of the above, the present invention aims to provide a humidification control method for a vacuum conditioner, so as to solve the problem that the moisture fluctuation in the subsequent link is large due to the existing humidification control method.

The technical scheme adopted by the invention is as follows:

a humidification control method of a vacuum conditioner comprises the following steps:

dividing a plurality of raw materials of which the difference between moisture and hygroscopicity in the batch of tobacco leaf formulas conforms to a set minimum difference range into the same circulating working group of the vacuum moisture regaining machine;

acquiring the average value of the moisture of the raw materials in the group as a first inlet moisture parameter of the vacuum damping machine;

taking a preset outlet moisture index of the vacuum damping machine as a second inlet moisture parameter of the loosening damping machine;

calculating the difference between the second inlet moisture parameter and the first inlet moisture parameter;

according to the difference, the total weight of the raw materials in the set and a preset correction coefficient, calculating the target water adding amount of a humidifying link of the vacuum moisture regaining machine;

and in the humidifying process, controlling the water adding operation of the vacuum damping machine in the humidifying link based on the calculated target water adding amount, the calculated actual water adding amount and the vacuum degree in the box of the vacuum damping machine.

In at least one possible implementation manner, the controlling the water adding operation of the vacuum damping machine in the humidifying link based on the calculated target water adding amount, the actual water adding amount and the in-tank vacuum degree of the vacuum damping machine comprises:

in the humidifying process, the actual water adding amount and the vacuum degree in the tank are obtained in real time;

and when the actual water adding amount reaches the target water adding amount and the vacuum degree in the tank is not reduced to a preset vacuum degree threshold value, stopping the humidifying operation and switching to a pressure maintaining link.

In at least one possible implementation manner, the controlling the water adding operation of the vacuum damping machine in the humidifying link based on the calculated target water adding amount, the actual water adding amount and the in-tank vacuum degree of the vacuum damping machine further includes:

when the vacuum degree in the box is reduced to a preset vacuum degree threshold value and the actual water adding amount does not reach the target water adding amount, suspending the humidifying operation and switching to a first pressure maintaining link;

after the first round of pressure maintaining link is finished, vacuum pumping operation is executed, and when the vacuum degree in the box reaches a preset vacuum degree value, humidification operation is resumed;

when the total amount of the actual water addition amount reaches the target water addition amount, the humidification operation is stopped and the second round of pressure maintaining link is carried out.

In at least one possible implementation manner, the pressure maintaining link performs the pressure maintaining operation according to a preset time length.

In at least one possible implementation manner, the actual water adding amount is detected by a flow meter arranged in a water supply pipeline of the vacuum conditioner.

The design concept of the invention is that different water adding quantities are calculated for different grades of tobacco leaves, the actual water adding quantity in the humidification link can be detected through a flowmeter, the water adding quantity is controlled to reach a set standard, and then the tobacco leaves are emptied out of the box, so that the tobacco leaves of different grades in batches are finely added with water on the basis of ensuring the moisture regain, the moisture at the outlet of the vacuum moisture regaining machine is kept consistent, and the requirement of the moisture at the inlet of the loosening moisture regaining machine is met. Particularly, by calculating the water adding amount of the corresponding batch type, bringing the water adding amount into the working cycle control of the vacuum dampening machine, and combining the actual measurement vacuum degree in the humidifying link process, the fluctuation of the outlet water can be effectively reduced, the water stability in the batch is improved, the subsequent processing difficulty is reduced, and the purpose of processing consistency is achieved. The method has the advantages of simple operation and obvious effect, and has good industrial application value and popularization and application prospects in the field.

Drawings

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings, in which:

fig. 1 is a flowchart of a humidification control method for a vacuum conditioner according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.

The invention provides an embodiment of a humidification control method of a vacuum conditioner, which is specifically shown in fig. 1 and can comprise the following steps:

step S1, dividing a plurality of raw materials of which the differences of moisture and hygroscopicity in the batch tobacco leaf formula accord with the set minimum difference range into the same circulating working group of the vacuum moisture regaining machine;

s2, acquiring the average value of the moisture of the raw materials in the group as a first inlet moisture parameter of the vacuum moisture regaining machine;

step S3, taking a preset outlet moisture index of the vacuum damping machine as a second inlet moisture parameter of the loosening damping machine;

step S4, calculating the difference between the second inlet moisture parameter and the first inlet moisture parameter;

step S5, according to the difference, the total weight of the raw materials in the set and a preset correction coefficient, calculating the target water adding amount of the humidifying link of the vacuum conditioner;

and step S6, controlling the water adding operation of the vacuum damping machine in the humidifying link based on the calculated target water adding amount, the actual water adding amount (which can be detected by a flow meter arranged in a spray water pipe of the vacuum damping machine) and the vacuum degree in the box of the vacuum damping machine in the humidifying process.

Regarding the water adding operation of the vacuum damping machine in the humidifying link based on the calculated target water adding amount, the actual water adding amount and the vacuum degree in the tank of the vacuum damping machine, reference may be made to the following:

in the humidifying process, the actual water adding amount and the vacuum degree in the tank are obtained in real time;

and when the actual water adding amount reaches the target water adding amount and the vacuum degree in the tank is not reduced to a preset vacuum degree threshold value, stopping the humidifying operation and switching to a pressure maintaining link.

In addition, when the vacuum degree in the tank is reduced to a preset vacuum degree threshold value and the actual water adding amount does not reach the target water adding amount, the humidifying operation is suspended and the first round of pressure maintaining link is carried out;

after the first round of pressure maintaining link is finished, vacuum pumping operation is executed, and when the vacuum degree in the box reaches a preset vacuum degree value, humidification operation is resumed;

when the total amount of the actual water addition amount reaches the target water addition amount, the humidification operation is stopped and the second round of pressure maintaining link is carried out.

Two points need to be pointed out, wherein once the vacuum degree in the box is reduced to a preset vacuum degree threshold value according to a set program of the vacuum conditioning machine, the humidifying operation needs to be stopped (suspended) no matter the state of other factors; and secondly, the pressure maintaining link is adopted, and the pressure maintaining operation can be carried out according to the preset time length no matter the first round or the second round is adopted.

For the purpose of facilitating an understanding of the above embodiments and their preferred versions, reference is made to the following illustrative examples:

specifically, the cut tobacco can be classified into a plurality of circulating work groups of the vacuum moisture regaining machine (tobacco leaves with the same or similar moisture and moisture absorption of a certain brand are cut and put into turnover boxes after being sliced, for example, the same work group comprises five turnover boxes, and then the tobacco leaves enter the vacuum moisture regaining machine box body to start a work cycle) according to the tobacco leaf grades with the same or similar moisture and moisture absorption as grouping standards (for example, the minimum difference range is set, for example, the moisture absorption difference between the raw materials is less than 0.1, so that the tobacco leaves can be used as one of the standards for dividing the tobacco leaves into the same group), wherein the total weight of the tobacco leaves with the same grade participating in the same round of vacuum moisture regaining cycle is exemplarily assumed to be 1000 kg (so as to be uniformly distributed to the five turnover boxes) and the tobacco leaves are sent to the vacuum moisture regaining machine box body according to the process requirement (such as 14%) of the moisture at the outlet of the vacuum moisture regaining machine (i.e. the inlet of the subsequent loose moisture regaining machine, subtracting the average measured moisture content (e.g. 11.3%) of the raw materials in the group, multiplying by the total weight of 1000 kg, and multiplying by the trade mark and a predetermined correction factor (the correction is mainly to overcome some influence factors, for example, but not limited to, the correction factor is set to 1.5 in this example), the target water addition amount for the current vacuum conditioning operation can be found as follows: (14% -11.3%) x 1000 × 1.5 ═ 40.5 kg.

In the actual operation of the vacuum damping machine, firstly, vacuumizing operation is carried out, when the vacuum degree reaches the preset 0.95KPa, the humidifying link is carried out, water is sprayed into the box body, namely, water with the pressure of 4 kilograms is sprayed into the box body through the binary nozzle along with steam injection, a flow meter in a water supply pipeline calculates the real total water adding amount in real time, and the vacuum degree is detected to be reduced through the in-box pressure measuring element. As mentioned above, when the system presets a vacuum drop of, for example, 55KPa (an increase in the air pressure value can be characterized as a decrease in vacuum), humidification must be stopped to ensure that moisture can rapidly enter the interior of the tobacco leaf.

At the moment, if the actual total water adding amount is detected to firstly reach the target calculated value of 40.5 kg and the vacuum degree is not yet reached to 55KPa, the humidification link is considered to reach the requirement, the humidification link is triggered to stop water spraying, and the humidification link is switched to a pressure maintaining link (such as pressure maintaining for 60 seconds); if the vacuum degree reaches 55KPa first and the actual water addition amount does not reach 40.5 kg (because the humidifying operation is automatically stopped when the vacuum degree is reduced to 55KPa according to the established program), the secondary humidifying is needed. At the moment, the first round of pressure maintaining can be carried out for 60 seconds to ensure that the tobacco leaves fully absorb moisture, then the second vacuumizing is carried out, when the vacuum degree is pumped to 20KPa (generally different from the initial vacuumizing value), the residual water adding amount is sprayed into the box body, and after the actual water adding total amount reaches the target calculation value, the second pressure maintaining link is carried out for 60 seconds.

After the pressure maintaining is finished, a reverse pumping link is carried out according to a conventional program, if the vacuum degree is pumped to 20KPa, the air is broken, air is injected into the box body, the box body is opened after the air pressure in the box body is balanced, and the vacuum moisture regaining work cycle is finished.

In conclusion, the design concept of the invention is that different water adding amounts are calculated for different grades of tobacco leaves, the actual water adding amount in the humidification link can be detected through a flowmeter, the water adding amount is controlled to reach the set standard, and then the tobacco leaves are broken to be taken out of the box, so that the tobacco leaves of different grades in batches are finely added with water on the basis of ensuring the moisture regain, the moisture at the outlet of the vacuum moisture regain machine is kept consistent, and the requirement of the moisture at the inlet of the loosening moisture regain machine is met. Particularly, by calculating the water adding amount of the corresponding batch type, bringing the water adding amount into the working cycle control of the vacuum dampening machine, and combining the actual measurement vacuum degree in the humidifying link process, the fluctuation of the outlet water can be effectively reduced, the water stability in the batch is improved, the subsequent processing difficulty is reduced, and the purpose of processing consistency is achieved. The method has the advantages of simple operation and obvious effect, and has good industrial application value and popularization and application prospects in the field.

In the embodiments of the present invention, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, and means that there may be three relationships, for example, a and/or B, and may mean that a exists alone, a and B exist simultaneously, and B exists alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter 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 singular or plural items. For example, at least one of a, b, and c may represent: a, b, c, a and b, a and c, b and c or a and b and c, wherein a, b and c can be single or multiple.

The structure, features and effects of the present invention have been described in detail with reference to the embodiments shown in the drawings, but the above embodiments are merely preferred embodiments of the present invention, and it should be understood that technical features related to the above embodiments and preferred modes thereof can be reasonably combined and configured into various equivalent schemes by those skilled in the art without departing from and changing the design idea and technical effects of the present invention; therefore, the invention is not limited to the embodiments shown in the drawings, and all the modifications and equivalent embodiments that can be made according to the idea of the invention are within the scope of the invention as long as they are not beyond the spirit of the description and the drawings.