CN111610748A - Coating liquid viscosity regulation and optimization method for tobacco processing - Google Patents
Coating liquid viscosity regulation and optimization method for tobacco processing Download PDFInfo
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- CN111610748A CN111610748A CN202010527168.3A CN202010527168A CN111610748A CN 111610748 A CN111610748 A CN 111610748A CN 202010527168 A CN202010527168 A CN 202010527168A CN 111610748 A CN111610748 A CN 111610748A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/10—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to temperature or viscosity of liquid or other fluent material discharged
Abstract
The invention provides a coating liquid viscosity regulation and optimization method for tobacco processing, and belongs to the technical field of disease auxiliary diagnosis. The coating liquid viscosity regulation and optimization method for tobacco processing comprises the following steps: s1: respectively acquiring a first instantaneous flow, a second instantaneous flow and a third instantaneous flow; s2: respectively obtaining a first sliding average value, a second sliding average value and a third sliding average value; s3: obtaining a predicted concentration value according to the first sliding average value, the second sliding average value and the third sliding average value; s4: and if the predicted concentration value is smaller than the set value, performing compensatory increase on the first instantaneous flow and the second instantaneous flow, and if the predicted concentration value is larger than the set value, performing compensatory decrease on the first instantaneous flow and the second instantaneous flow. The invention stabilizes the concentration of the coating liquid, improves the removal rate of the fine fibers in the recovered feed liquid, regulates and controls indexes in real time and achieves the aim of tracking the quality stability in real time.
Description
Technical Field
The invention belongs to the technical field of paper-making reconstituted tobacco, and relates to a coating liquid viscosity regulation and optimization method for tobacco processing.
Background
In the development of Chinese style cigarettes, tar and harm reduction is the most important strategic link. The application of the paper-making reconstituted tobacco can effectively reduce the harmful ingredients of cigarette products. In the production of reconstituted tobacco by a paper-making method, waste materials such as tobacco stems, tobacco powder, tobacco flakes and the like in the cigarette processing process are used as raw materials, tobacco extract obtained by solid-liquid separation and extraction is subjected to multilayer purification and concentration, and then is added with fragrance and blended into coating liquid through a batching working section, and the coating liquid is accurately, uniformly and stably sprayed on a sheet base of the reconstituted tobacco according to the designed coating rate, and is turned into 'waste material' after being dried and sliced for cigarette production. In the process of continuously applying and recycling the coating liquid, the tiny fibers on the film base are continuously accumulated, so that the viscosity of the coating liquid is continuously increased, the coating rate of the reconstituted tobacco is directly influenced, and certain uncontrollable property is brought to continuous and stable production.
Chinese patent CN 102217787A discloses a purification process of coating liquid in the production of paper-making reconstituted tobacco, which belongs to the technical field of paper-making reconstituted tobacco and comprises the following steps: the redundant coating liquid on the coating machine flows back to the coating in-situ tank, and is converged with the coating liquid supplied by the preparation tank in the tank, and the coating liquid in the tank is purified by a horizontal screw machine connected with the coating in-situ tank and then returns to the tank for recycling. In the invention, the coating-in-place tank supplies the coating liquid to the coating machine, and the tank not only contains the coating liquid supplied by the preparation tank, but also continuously collects the coating liquid returned from the coating machine, so that the coating liquid is recycled. However, the reflow coating liquid contains many fine fibers and calcium carbonate which are peeled off from the sheet base, and the coating liquid becomes viscous by long-term accumulation. The external spiral shell machine that crouches is put to the coating in situ jar, makes the coating liquid in the in situ jar constantly through crouching spiral shell machine circulation processing, then can make the coating liquid in the jar keep the viscosity balance, promotes the stability of quality of product, guarantees going on smoothly of whole production process. In the above patent, the viscosity of the coating liquid in the in-situ tank is balanced by processing the coating liquid by a horizontal screw machine, and the fine fibers and calcium carbonate and other substances peeled off from the substrate are separated from the coating liquid by the horizontal screw machine, but the concentration of the coating liquid is changed by this, the sum of the flow rate of the excessive coating liquid flowing back from the coating machine and the flow rate of the coating liquid supplied by the preparation tank is unstable, which causes large fluctuation of the concentration of the coating liquid in the in-situ tank, thereby causing instability of the detected concentration, further causing low precision of water addition for the coating liquid preparation, and affecting the continuous and stable production of the coating liquid.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a method for regulating and optimizing the viscosity of a coating liquid for tobacco processing, and the technical problems to be solved by the invention are as follows: how to provide a coating liquid viscosity regulation and optimization method for tobacco processing.
The purpose of the invention can be realized by the following technical scheme:
a coating liquid viscosity regulation and optimization method for tobacco processing comprises the following steps:
s1: respectively acquiring a first instantaneous flow of fresh coating liquid flowing into a liquid storage tank, a second instantaneous flow of recovered coating liquid flowing into the liquid storage tank and a third instantaneous flow of coating liquid flowing out of the liquid storage tank;
s2: respectively acquiring a first sliding average value of the first instantaneous flow, a second sliding average value of the second instantaneous flow and a third sliding average value of the third instantaneous flow;
s3: obtaining a predicted concentration value according to the first sliding average value, the second sliding average value and the third sliding average value;
s4: and if the predicted concentration value is smaller than the set value, performing compensatory increase on the first instantaneous flow and the second instantaneous flow, and if the predicted concentration value is larger than the set value, performing compensatory decrease on the first instantaneous flow and the second instantaneous flow.
Preferably, the first instantaneous flow rate is
The second instantaneous flow rate is
The third instantaneous flow rate is
The first sliding average is
The second sliding average is
The third sliding average is
In step S3, the first moving average, the second moving average, and the third moving average are calculated according to the formula
Calculating a predicted concentration value
Wherein
Is the preset standard concentration of the coating liquid.
Preferably, the step S2 of obtaining the first moving average, the second moving average, and the third moving average specifically includes: the first sliding average value or the second sliding average value or the third sliding average value is one from one
Computing a plurality of continuations in a time series of items
Mean value of a sequence of terms, wherein
The first item of the item sequence is original
Second term to second term of sequence
Sum of terms divided by
Is continuous in
The second term of the term sequence is original
Second item of sequence to
Sum of terms divided by
Is continuous in
The last item of the item sequence is original
The first of the sequence
Item to
Sum of terms divided by
Will then continue
First item to second item in item sequence
Sum of terms divided by
A running average is obtained.
Preferably, a plurality of time-shifted sampling windows are acquired in one sampling period, and each sampling window is acquired in each sampling window
、
And
the value is obtained.
Preferably, step S1 further includes receiving fresh coating liquid delivered from the dispensing room by the liquid storage tank, receiving coating liquid flowing out of the liquid storage tank by the glue applicator, filtering the coating liquid overflowing from the glue applicator by the rectangular screen, recovering the coating liquid overflowing from the glue applicator by the recovery tank, and detecting the viscosity of the coating liquid in the recovery tank by the viscometer, where the recovery tank delivers the coating liquid to the liquid storage tank when the viscosity of the coating liquid in the recovery tank is detected by the viscometer to be within a preset viscosity range.
Preferably, the step S1 further comprises the steps of controlling the recovery tank to convey the coating liquid to the liquid storage tank through the control station when the viscosity of the coating liquid in the viscosity meter detection recovery tank is within the preset viscosity range by adopting the PLC, controlling the recovery tank to discharge slag materials through the control station when the viscosity of the coating liquid in the viscosity meter detection recovery tank is not within the preset viscosity range, controlling the liquid storage tank, the glue applicator, the rectangular sieve, the viscosity meter and the recovery tank through the control station, and connecting the PLC with the control station through a DP bus interface module.
Preferably, the step S1 further includes detecting a real-time concentration of the coating liquid flowing out of the liquid storage tank by using a concentration meter, obtaining a first instantaneous flow rate of a fresh coating liquid flowing into the liquid storage tank by using a first flow meter, obtaining a second instantaneous flow rate of a recovered coating liquid flowing into the liquid storage tank by using a second flow meter, and obtaining a third instantaneous flow rate of the coating liquid flowing out of the liquid storage tank by using a third flow meter, wherein the PLC controls the liquid storage tank to deliver the coating liquid to the size press by using the control station when the real-time concentration of the coating liquid is within a preset concentration range, performs a compensatory decrease on the first instantaneous flow rate and the second instantaneous flow rate by using the control station when the real-time concentration of the coating liquid is greater than the preset concentration range, and performs a compensatory increase on the first instantaneous flow rate and the second instantaneous flow rate by using the control station.
Preferably, the PLC obtains a predicted concentration value by performing steps S1-S3 when the real-time concentration of the coating liquid is within a preset concentration range, the PLC performs a real-time compensatory increase on the first instantaneous flow and the second instantaneous flow through the control station when the predicted concentration value is less than a set value, and performs a compensatory decrease on the first instantaneous flow and the second instantaneous flow through the control station when the predicted concentration value is greater than the set value, the PLC uses indirect addressing of registers to store the first instantaneous flow, the second instantaneous flow, the third instantaneous flow, and the set value in the storage area, and the PLC calculates a sliding average value by addressing in the storage area.
Preferably, the PLC compensates for the first instantaneous flow rate and the second instantaneous flow rate by adding the coating liquid to the reservoir when the predicted concentration value is less than the set value, and compensates for the first instantaneous flow rate and the second instantaneous flow rate by adding water to the reservoir when the predicted concentration value is greater than the set value.
Preferably, the PLC predicts to increase the first amount of the coating liquid and controls to add the first amount of the fresh coating liquid to the fresh coating liquid in the reservoir tank through the control station when the predicted concentration value is less than the set value, and predicts to increase the second amount of water and adds the second amount of water to the reservoir pipe through the control station when the predicted concentration value is greater than the set value.
The invention has the following beneficial effects: 1. firstly, respectively obtaining a first instantaneous flow when fresh coating liquid flows into a liquid storage tank, a second instantaneous flow when recovered coating liquid flows into the liquid storage tank and a third instantaneous flow when coating liquid flows out of the liquid storage tank, respectively obtaining a first sliding average value of the first instantaneous flow, a second sliding average value of the second instantaneous flow and a third sliding average value of the third instantaneous flow, then obtaining a predicted concentration value according to the first sliding average value, the second sliding average value and the third sliding average value, if the predicted concentration value is less than a set value, performing compensatory increase on the first instantaneous flow and the second instantaneous flow, and if the predicted concentration value is more than the set value, performing compensatory decrease on the first instantaneous flow and the second instantaneous flow, and combining an optimized algorithm of proportion calculation, feedback and regulation, effectively improving the problem that the viscosity of the coating liquid rises too fast under continuous production, the concentration of the coating liquid is stabilized, the removal rate of fine fibers in the recovered feed liquid is improved, the stability of a system applying the regulation and control optimization method is effectively improved, indexes are regulated and controlled in real time, and the purpose of tracking the quality stability in real time is achieved.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic flow diagram of tobacco processing in the present invention;
FIG. 3 is a graph of the trend of concentration change before the optimization method of the present invention is used;
FIG. 4 is a graph of the trend of concentration change after the optimization method of the present invention is used.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Referring to fig. 1 to 4, the method for optimizing viscosity control of a coating liquid for tobacco processing in the present embodiment includes the following steps:
s1: respectively acquiring a first instantaneous flow of fresh coating liquid flowing into a liquid storage tank, a second instantaneous flow of recovered coating liquid flowing into the liquid storage tank and a third instantaneous flow of coating liquid flowing out of the liquid storage tank;
s2: respectively acquiring a first sliding average value of the first instantaneous flow, a second sliding average value of the second instantaneous flow and a third sliding average value of the third instantaneous flow;
s3: obtaining a predicted concentration value according to the first sliding average value, the second sliding average value and the third sliding average value;
s4: and if the predicted concentration value is smaller than the set value, performing compensatory increase on the first instantaneous flow and the second instantaneous flow, and if the predicted concentration value is larger than the set value, performing compensatory decrease on the first instantaneous flow and the second instantaneous flow.
First, respectively obtaining a first instantaneous flow when fresh coating liquid flows into a liquid storage tank, a second instantaneous flow when recovered coating liquid flows into the liquid storage tank and a third instantaneous flow when coating liquid flows out of the liquid storage tank, respectively obtaining a first sliding average value of the first instantaneous flow, a second sliding average value of the second instantaneous flow and a third sliding average value of the third instantaneous flow, then obtaining a predicted concentration value according to the first sliding average value, the second sliding average value and the third sliding average value, if the predicted concentration value is smaller than a set value, performing compensatory increase on the first instantaneous flow and the second instantaneous flow, and if the predicted concentration value is larger than the set value, performing compensatory decrease on the first instantaneous flow and the second instantaneous flow, and combining an optimized algorithm of proportion calculation, feedback and adjustment, effectively improving the problem that the viscosity of the coating liquid rises too fast under continuous production, the concentration of the coating liquid is stabilized, the removal rate of fine fibers in the recovered feed liquid is improved, the stability of a system applying the regulation and control optimization method is effectively improved, indexes are regulated and controlled in real time, and the purpose of tracking the quality stability in real time is achieved.
The first instantaneous flow is
The second instantaneous flow rate is
The third instantaneous flow rate is
The first sliding average is
The second sliding average is
The third sliding average is
In step S3, the first moving average, the second moving average, and the third moving average are calculated according to the formula
Calculating a predicted concentration value
Wherein
Is the preset standard concentration of the coating liquid. The concept of a sliding average is introduced to smooth out sudden fluctuations so that for the first instantaneous flow rate
The second instantaneous flow rate is
The compensatory increase or decrease is not too frequent.
The step S2 of obtaining the first moving average, the second moving average, and the third moving average specifically includes: the first sliding average value or the second sliding average value or the third sliding average value is one from one
Computing a plurality of continuations in a time series of items
Mean value of a sequence of terms, wherein
The first item of the item sequence is original
Second term to second term of sequence
Sum of terms divided by
Is continuous in
The second term of the term sequence is original
Second item of sequence to
Sum of terms divided by
Is continuous in
The last item of the item sequence is original
The first of the sequence
Item to
Sum of terms divided by
Will then continue
First item to second item in item sequence
Sum of terms divided by
A running average is obtained. Take an example of a 3 cycle time sliding average: there are 5 numbers of 1, 2, 3, 4, 5, the calculation process is: (1 +2+ 3)/3 =2, (2 +3+ 4)/3 =3, (3 +4+ 5)/3 =4, and 3 cycle sliding average = (2 +3+ 4)/3 = 3.
Acquiring a plurality of sampling windows moving along with time in a sampling period, and acquiring in each sampling window respectively
、
And
the value is obtained. Taking 10 values in each period with 5 seconds as a sampling period, and substituting the average value in each sampling period into the calculation to accumulate in the sampling period
、
And
the value is obtained. The window width is the time range, and the window moves along with the time to obtain the processing data in each time period. The processing process avoids the bin promotion adjustment when the feeding proportion is too large due to too little feeding or the feeding proportion is too much due to too much feeding, and focuses more on the stability of the ratio in the whole process, thereby improving the stability of the whole system.
And step S1, receiving fresh coating liquid conveyed from the batching room by the liquid storage tank, receiving the coating liquid flowing out of the liquid storage tank by the sizing machine, filtering the coating liquid overflowing from the sizing machine by a rectangular sieve, recovering the coating liquid overflowing from the sizing machine by a recovery tank, detecting the viscosity of the coating liquid in the recovery tank by a viscometer, and conveying the coating liquid to the liquid storage tank when the viscosity of the coating liquid in the recovery tank is detected to be within a preset viscosity range by the viscometer by the recovery tank.
Step S1 also includes that PLC controls the recovery tank to convey the coating liquid to the liquid storage tank through the control station when the viscosity of the coating liquid in the viscosity meter detection recovery tank is within the preset viscosity range, controls the recovery tank to discharge slag materials through the control station when the viscosity of the coating liquid in the viscosity meter detection recovery tank is not within the preset viscosity range, the control station controls the liquid storage tank, the glue applicator, the rectangular sieve, the viscosity meter and the recovery tank, and the PLC is connected with the control station through a DP bus interface module.
The step S1 further comprises the steps of detecting the real-time concentration of the coating liquid flowing out of the liquid storage tank by using a concentration meter, obtaining a first instantaneous flow rate when fresh coating liquid flows into the liquid storage tank by using a first flow meter, obtaining a second instantaneous flow rate when recovered coating liquid flows into the liquid storage tank by using a second flow meter, obtaining a third instantaneous flow rate when the coating liquid flows out of the liquid storage tank by using a third flow meter, controlling the liquid storage tank by using a control station to convey the coating liquid to the sizing machine by using a PLC when the real-time concentration of the coating liquid is within a preset concentration range, performing compensatory reduction on the first instantaneous flow rate and the second instantaneous flow rate by using the control station when the real-time concentration of the coating liquid is greater than the preset concentration range, and performing compensatory increase on the first instantaneous flow rate and the second instantaneous flow rate by using the control.
The PLC obtains a predicted concentration value by executing the steps S1-S3 when the real-time concentration of the coating liquid is within a preset concentration range, the PLC performs real-time compensation increase on the first instantaneous flow and the second instantaneous flow through the control station when the predicted concentration value is smaller than a set value, and performs compensation decrease on the first instantaneous flow and the second instantaneous flow through the control station when the predicted concentration value is larger than the set value, the PLC adopts a register to indirectly address so as to store the first instantaneous flow, the second instantaneous flow, the third instantaneous flow and the set value in a storage area, and the PLC calculates a sliding average value through addressing in the storage area.
The PLC compensates the first instantaneous flow and the second instantaneous flow by adding the coating liquid to the liquid storage tank when the predicted concentration value is smaller than the set value, and compensates the first instantaneous flow and the second instantaneous flow by adding water to the liquid storage tank when the predicted concentration value is larger than the set value.
The PLC predicts a first amount of the coating liquid to be added and controls the addition of the first amount of the fresh coating liquid to the fresh coating liquid in the liquid storage tank through the control station when the predicted concentration value is less than the set value, and predicts a second amount of the added water to be added and adds the second amount of the water to the liquid storage pipe through the control station when the predicted concentration value is greater than the set value.
The regulating and controlling system based on the application mainly comprises two parts, namely mechanical equipment and electric control equipment, wherein the mechanical equipment mainly comprises a storage tank, a recovery tank and a rectangular sieve, and the storage tank is used for storing fresh coating liquid conveyed by a batching room; the recovery tank is used for collecting coating liquid overflowing from the sizing applicator, the electric control equipment is based on PLC S7-300 and mainly comprises a control station and a valve island, sensor signals such as liquid level and temperature of a tank body in the whole system, local switches and the like and driving units such as motors and the like are directly connected to modules in the control box, and the modules are communicated with the PLC through a DP bus interface module. Referring to fig. 2, the process flow based on the present application mainly includes: when the sizing machine is opened, the coating liquid is refluxed and collected, the reflux pipe is sent to the rectangular sieve, the recovery tank collects the coating liquid filtered by the rectangular sieve, and the coating liquid flows to the storage tank after the viscosity meter is detected to be qualified. The control difficulty of the control system lies in the step of re-allocating, and in the conventional charging process, because the flow of the supplied materials (fresh coating liquid) is stable, the first instantaneous flow is
The second instantaneous flow rate is
The third instantaneous flow rate is
Instantaneous value of concentration meter is
The preset standard concentration is
The current concentration value
And a set value
Make a comparison if
<
If the feeding is insufficient, the first instantaneous flow is
The second instantaneous flow rate is
On the contrary
>
The first instantaneous flow should be
The second instantaneous flow rate is
The compensatory ability decreases. Referring to FIG. 3, by observing the relationship curve when the optimization method of the present application is not used, the horizontal line in the graph is the reference value of 1.19mol/L, and the wavy line in the graph is the concentration measurement value, it can be seen that
The fluctuation is large, the detected concentration is unstable, and the control precision of the water adding and blending link is low. Referring to FIG. 4, where the horizontal line is the reference value of 1.19mol/L and the wavy line is the measured concentration value, it can be seen by observing the relationship curve after using the optimization method of the present application
The fluctuation is not large, and the detected concentrationThe method is stable, the stability of the system is effectively improved through algorithm optimization, the indexes are regulated and controlled in real time, and the purpose of tracking the quality stability in real time is achieved.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. A method for adjusting and optimizing the viscosity of a coating liquid for tobacco processing is characterized by comprising the following steps:
s1: respectively acquiring a first instantaneous flow of fresh coating liquid flowing into a liquid storage tank, a second instantaneous flow of recovered coating liquid flowing into the liquid storage tank and a third instantaneous flow of coating liquid flowing out of the liquid storage tank;
s2: respectively acquiring a first sliding average value of the first instantaneous flow, a second sliding average value of the second instantaneous flow and a third sliding average value of the third instantaneous flow;
s3: obtaining a predicted concentration value according to the first sliding average value, the second sliding average value and the third sliding average value;
s4: and if the predicted concentration value is smaller than the set value, performing compensatory increase on the first instantaneous flow and the second instantaneous flow, and if the predicted concentration value is larger than the set value, performing compensatory decrease on the first instantaneous flow and the second instantaneous flow.
2. The method for optimizing viscosity control of coating liquid for tobacco processing according to claim 1, wherein: the first instantaneous flow is
The second instantaneous flow rate is
The third instantaneous flow rate is
The first sliding average is
The second sliding average is
The third sliding average is
In step S3, the first moving average, the second moving average, and the third moving average are calculated according to the formula
Calculating a predicted concentration value
Wherein
Is the preset standard concentration of the coating liquid.
3. The method for optimizing viscosity control of coating liquid for tobacco processing according to claim 2, wherein the obtaining of the first sliding average, the second sliding average, and the third sliding average in step S2 specifically includes: the first sliding average value or the second sliding average value or the third sliding average value is one from one
Computing a plurality of continuations in a time series of items
Mean value of a sequence of terms, wherein
The first item of the item sequence is original
First to second item of sequence
Sum of terms divided by
Is continuous in
The second term of the term sequence is original
Second item of sequence to
Sum of terms divided by
Is continuous in
The last item of the item sequence is original
The first of the sequence
Item to
Sum of terms divided by
Will then continue
First item to second item in item sequence
Sum of terms divided by
A running average is obtained.
4. The method for optimizing viscosity control of coating liquid for tobacco processing according to claim 3, wherein: acquiring a plurality of sampling windows moving along with time in a sampling period, and acquiring in each sampling window respectively
、
And
the value is obtained.
5. The method for optimizing viscosity control of coating liquid for tobacco processing according to claim 3 or 4, wherein: the step S1 further comprises the steps of receiving fresh coating liquid conveyed from the batching room by the liquid storage tank, receiving the coating liquid flowing out of the liquid storage tank by the sizing machine, filtering the coating liquid overflowing from the sizing machine by the rectangular sieve, recovering the coating liquid overflowing from the sizing machine by the recovery tank, and detecting the viscosity of the coating liquid in the recovery tank by the viscometer, wherein the recovery tank conveys the coating liquid to the liquid storage tank when the viscosity of the coating liquid in the recovery tank is detected by the viscometer to be within a preset viscosity range.
6. The method for optimizing viscosity control of coating liquid for tobacco processing according to claim 5, wherein: step S1 still includes and controls the recovery tank to carry the coating liquid to the liquid storage pot through the control station when the viscosity of the coating liquid in the viscosity meter detection recovery tank is within the preset viscosity range, controls the recovery tank to discharge slag material through the control station when the viscosity of the coating liquid in the viscosity meter detection recovery tank is not within the preset viscosity range, the control station controls the liquid storage pot, the size applicator, the rectangular sieve, the viscosity meter and the recovery tank, and PLC is connected with the control station through a DP bus interface module.
7. The method for optimizing viscosity control of coating liquid for tobacco processing according to claim 6, wherein: the step S1 further comprises the steps of detecting the real-time concentration of the coating liquid flowing out of the liquid storage tank by using a concentration meter, obtaining a first instantaneous flow rate when fresh coating liquid flows into the liquid storage tank by using a first flow meter, obtaining a second instantaneous flow rate when recovered coating liquid flows into the liquid storage tank by using a second flow meter, and obtaining a third instantaneous flow rate when the coating liquid flows out of the liquid storage tank by using a third flow meter, wherein the PLC controls the liquid storage tank to convey the coating liquid to the sizing machine by using a control station when the real-time concentration of the coating liquid is within a preset concentration range, reduces the first instantaneous flow rate and the second instantaneous flow rate in a compensating mode by using the control station when the real-time concentration of the coating liquid is greater than the preset concentration range, and increases the first instantaneous flow rate and the second instantaneous flow rate in a compensating mode by using the.
8. The method for optimizing viscosity control of coating liquid for tobacco processing according to claim 7, wherein: the PLC obtains a predicted concentration value by executing steps S1-S3 when the real-time concentration of the coating liquid is within a preset concentration range, the PLC performs real-time compensation increase on the first instantaneous flow and the second instantaneous flow through the control station when the predicted concentration value is smaller than a set value, and performs compensation decrease on the first instantaneous flow and the second instantaneous flow through the control station when the predicted concentration value is larger than the set value, the PLC adopts indirect addressing of a register to store the first instantaneous flow, the second instantaneous flow, the third instantaneous flow and the set value in a storage area, and the PLC calculates a sliding average value through addressing in the storage area.
9. The method for optimizing viscosity control of coating liquid for tobacco processing according to claim 8, wherein: the PLC compensates the first instantaneous flow and the second instantaneous flow by adding the coating liquid to the liquid storage tank when the predicted concentration value is smaller than the set value, and compensates the first instantaneous flow and the second instantaneous flow by adding water to the liquid storage tank when the predicted concentration value is larger than the set value.
10. The method for optimizing viscosity control of coating liquid for tobacco processing according to claim 9, wherein: the PLC predicts a first amount of the coating liquid to be added when the predicted concentration value is less than the set value and controls the addition of the first amount of the fresh coating liquid to the fresh coating liquid in the liquid storage tank through the control station, and predicts a second amount of the added water to be added when the predicted concentration value is greater than the set value and adds the second amount of the water to the liquid storage pipe through the control station.
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| CN112890265A (en) * | 2021-03-31 | 2021-06-04 | 安徽中烟再造烟叶科技有限责任公司 | Paper-making process reconstituted tobacco dip-coating type coating liquid physical index control device and method |
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2020
- 2020-06-11 CN CN202010527168.3A patent/CN111610748A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112890265A (en) * | 2021-03-31 | 2021-06-04 | 安徽中烟再造烟叶科技有限责任公司 | Paper-making process reconstituted tobacco dip-coating type coating liquid physical index control device and method |
| CN112890265B (en) * | 2021-03-31 | 2023-05-30 | 安徽中烟再造烟叶科技有限责任公司 | Device and method for controlling physical index of dip-coating type coating liquid of reconstituted tobacco by papermaking method |
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