CN114182562A - Intelligent optimization method and system for net dewatering element - Google Patents
Intelligent optimization method and system for net dewatering element Download PDFInfo
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- CN114182562A CN114182562A CN202111539963.5A CN202111539963A CN114182562A CN 114182562 A CN114182562 A CN 114182562A CN 202111539963 A CN202111539963 A CN 202111539963A CN 114182562 A CN114182562 A CN 114182562A
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- opening degree
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/48—Suction apparatus
- D21F1/483—Drainage foils and bars
- D21F1/486—Drainage foils and bars adjustable
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Abstract
The invention is suitable for the technical field of papermaking machinery, and particularly provides an intelligent optimization method and system for a wire dewatering element, wherein the optimization method comprises the steps of obtaining a first opening S1 of a hydraulic proportional valve, increasing the first opening S1 according to an opening delta S1 to obtain a second opening S2, and increasing and continuing to execute the second opening S2 in unit time delta t 1; and when the second opening S2 is smaller than the preset opening a, measuring the pulp evenness to obtain a pulp evenness measuring result, and determining the optimal value of the opening of the hydraulic proportional valve according to the pulp evenness measuring result. The inclination angle of the dewatering plate is adjusted by adopting the optimization method and the system, the experience requirement on workers is lower, compared with the traditional method of manually setting the inclination angle, the inclination angle is stricter and more accurate in the testing process, the obtained inclination angle is more excellent in dewatering effect, the control module stores relevant parameters and curves in the optimization adjusting process, and the adjustment can be completed without a large number of tests under the condition of changing the working condition.
Description
Technical Field
The invention belongs to the technical field of papermaking machinery, and particularly relates to an intelligent optimization method and system for a wire dewatering element.
Background
The wire section is an important part of the paper machine that affects the quality of the paper web, and once the wet paper web is formed in the wire section of the paper machine, the fiber interlacing state of the paper web is substantially set, and the properties of the formed paper web are only marginally improved in the subsequent pressing, drying, calendering, and the like. Thus, if a high quality paper product is to be produced, a good web former is required, and the dewatering plates are critical for producing a high quality paper product.
Specifically, the factors influencing the performance of the dewatering plate mainly include the inclination angle and the geometric dimension of the body, and the dewatering plate is not replaced under the ordinary condition, so that the angle of the inclination angle must be manually adjusted, slurry disturbance is not caused, and the dewatering performance is greatly improved.
In the prior art, the inclination angle of the dewatering plate is adjusted manually mainly by an operator, the operator manually adjusts the angle on site according to experience, and then in the next production, the angle is manually adjusted by experience judgment according to the dryness detection of the wet paper web, the formation condition of the paper web and the like. Although only the labor cost is needed, the dewatering condition of the wire part is changed due to factors such as vehicle speed, pulp seeds, additives and the like, and the dewatering condition in the production still can not achieve the best effect due to the fact that the adjustment is needed for many times.
Disclosure of Invention
The invention aims to provide a method and a system for intelligently optimizing a wire dewatering element, and aims to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions.
In a first aspect, the present invention provides a method for intelligent optimization of wire section dewatering elements, the method comprising the steps of:
step S101, acquiring a first opening degree S1 of the hydraulic proportional valve, increasing the first opening degree S1 according to the opening degree delta S1 to obtain a second opening degree S2, and increasing and continuing the second opening degree S2 for unit time delta t 1;
step S102, when the second opening degree S2 is smaller than a preset opening degree a, executing step S103;
when the second opening degree S2 is not less than the preset opening degree a, executing step S104;
step S103: measuring the paper pulp evenness to obtain a paper pulp evenness measuring result;
when the measured result of the pulp evenness is qualified, executing a step S101;
when the measured result of the pulp evenness is unqualified, executing step S104;
step S104: the first opening degree S1 is set as an optimum value of the hydraulic proportional valve opening degree.
In some embodiments provided by the present invention, the obtaining manner of the preset opening a includes the following steps:
the third opening degree S3 is increased by an opening degree Δ S2 per unit time Δ t2 to obtain a fourth opening degree S4;
calculating the average flow rate of the third opening degree S3 in the unit time delta t2 from 0-100% based on the instantaneous flow rate of the flow sensor of the suction box, and generating a dehydration effect curve;
and determining the preset opening a when the average flow is the maximum value according to the dehydration effect curve.
In some embodiments, the step of calculating the average flow rate of the third opening degree S3 from 0-100% in the unit time Δ t2 and generating the dewatering effect curve includes:
and keeping the fourth degree S4, calculating the real-time instantaneous flow obtained by the flow sensor of the vacuum suction box to obtain the average flow in unit time delta t2, and obtaining a dehydration effect curve graph by taking the opening degree signal as an x axis and the average flow as a y axis.
In some embodiments provided by the present invention, the optimization method further comprises the following steps:
sending the optimal value of the opening of the hydraulic proportional valve to a hydraulic actuator on the dewatering plate;
and the hydraulic actuator adjusts the inclination angle of the dewatering plate according to the optimal value.
In a second aspect, the present invention provides a wire section dewatering element intelligent optimization system for performing the optimization method as provided in the first aspect, the optimization system comprising:
the signal acquisition module is used for acquiring operation data, and the operation data comprises pulp evenness, water tank flow and proportional valve opening;
the control module is used for collecting the operation data and analyzing and processing the operation data according to the optimization method to obtain an optimal value of the opening of the hydraulic proportional valve;
the signal output module is used for adjusting the inclination angle of the dewatering plate according to the optimal value;
and the power supply module is used for supplying power to the signal acquisition module, the control module and the signal output module.
In some embodiments provided by the present invention, the signal acquisition module and the control module establish a communication connection through a first communication module, and the operation data acquired by the signal acquisition module is sent to the control module through the first communication module.
In some embodiments provided by the present invention, the control module and the signal output module establish a communication connection through a second communication module, and the optimal value of the opening degree of the hydraulic proportional valve obtained by the control module is sent to the signal output module through the second communication module.
In some embodiments provided herein, the signal acquisition module comprises:
the paper pulp evenness scanning frame is used for collecting paper pulp evenness;
the flow sensor of the suction box is used for collecting the flow of the water tank;
and the proportional valve opening sensor is used for acquiring the proportional valve opening.
In some embodiments provided herein, the control module is a computer device, the computer device comprising:
a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the optimization method.
In some embodiments provided herein, the signal output module is a hydraulic actuator for adjusting the inclination angle of the dewatering plates according to the optimal value.
Compared with the prior art, the intelligent optimization method and system for the net part dewatering elements, provided by the invention, have the technical advantages that: the optimization method and the system provided by the invention are used for adjustment, the operation is simple and convenient, the control module of the system can automatically adjust a proper angle according to real-time process parameters by pressing a button by an operator, compared with the traditional method for manually setting the angle of the inclination angle, the system is stricter and more accurate in the test process, the obtained inclination angle is better in dehydration effect, the control module stores relevant parameters and curves in the adjustment process, and the adjustment can be completed without a large number of tests under the condition of changing the working condition.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.
Fig. 1 is a flow chart of an implementation of a method for intelligently optimizing a wire dewatering element according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating an implementation of a manner of obtaining a preset opening a according to an embodiment of the present invention;
FIG. 3 is a sub-flowchart of an implementation of a method for intelligently optimizing dewatering elements of a wire section according to an embodiment of the present invention;
FIG. 4 is a block diagram of a system for intelligently optimizing dewatering elements of a wire section according to an embodiment of the present invention;
FIG. 5 is a schematic view of the dehydration effect curve of the present invention.
FIG. 6 is a logic flow diagram of an optimization method provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Specific implementations of the present invention are described in detail below with reference to specific embodiments.
Fig. 1 shows a flow chart of an implementation of a method for intelligent optimization of a wire section dewatering element according to an embodiment of the present invention;
in one embodiment provided by the present invention, as shown in fig. 1, a method for intelligent optimization of a wire section dewatering element, the optimization method comprises the steps of:
step S101, acquiring a first opening degree S1 of the hydraulic proportional valve, increasing the first opening degree S1 according to the opening degree delta S1 to obtain a second opening degree S2, and increasing and continuing the second opening degree S2 for unit time delta t 1;
step S102, when the second opening degree S2 is smaller than a preset opening degree a, executing step S103;
when the second opening degree S2 is not less than the preset opening degree a, executing step S104;
step S103: measuring the paper pulp evenness to obtain a paper pulp evenness measuring result;
when the measured result of the pulp evenness is qualified, executing a step S101;
when the measured result of the pulp evenness is unqualified, executing step S104;
step S104: the first opening degree S1 is set as an optimum value of the hydraulic proportional valve opening degree.
In the embodiment of the present invention, the preset first opening degree S1 of the acquisition hydraulic proportional valve is acquired by restoring the opening degree of the hydraulic proportional valve in the system (the first opening degree S1) and increasing the opening degree of the hydraulic proportional valve by the opening degree Δ S1 of a certain unit after the preset opening degree a is obtained through step S203. And (4) entering the next pulp evenness detection step every time the opening degree is increased, returning to the previous step to continuously increase the opening degree if the opening degree is qualified, and using the first opening degree S1 of the previous step if the opening degree is not qualified, wherein the opening degree is the optimal inclination angle adjustment angle.
Fig. 2 shows a flowchart of an implementation of a manner of obtaining the preset opening a according to an embodiment of the present invention.
As shown in fig. 2, in a preferred embodiment of the present invention, the obtaining manner of the preset opening a includes the following steps:
step S201: the third opening degree S3 is increased by an opening degree Δ S2 per unit time Δ t2 to obtain a fourth opening degree S4;
in a specific implementation of step S201 provided by an embodiment of the present invention, the dewatering plate increases the hydraulic proportional valve opening Δ S2 from 0 by a unit time Δ t 2.
Further, the preset opening a is obtained in a manner that the method further includes the following steps:
step S202: calculating the average flow rate of the third opening degree S3 in the unit time delta t2 from 0-100% based on the instantaneous flow rate of the flow sensor of the suction box, and generating a dehydration effect curve;
in the specific implementation of step S202 provided in the embodiment of the present invention, a dewatering effect graph of an average flow rate per unit time Δ t2 from 0 to 100% of the opening of the hydraulic proportional valve (i.e., the third opening S3) is calculated from the instantaneous flow rate of the flow rate sensor of the vacuum suction box, and the dewatering effect graph is obtained by using the opening signal S as an x-axis and the average flow rate as a y-axis, and is shown in fig. 5.
Step S203: and determining a preset opening a when the average flow is the maximum according to the dewatering effect curve, wherein the preset opening a is an opening numerical value corresponding to the maximum value of the average flow in the dewatering effect curve as can be seen from a graph shown in fig. 5.
In some embodiments, the step of calculating the average flow rate of the third opening degree S3 from 0-100% in the unit time Δ t2 and generating the dewatering effect curve includes:
and keeping the fourth degree S4, calculating the real-time instantaneous flow obtained by the flow sensor of the vacuum suction box to obtain the average flow in unit time delta t2, and obtaining a dehydration effect curve graph by taking the opening degree signal as an x axis and the average flow as a y axis.
As shown in fig. 3, in some embodiments of the present invention, the optimization method further includes the following steps:
step S301: sending the optimal value of the opening of the hydraulic proportional valve to a hydraulic actuator on the dewatering plate;
step S302: and the hydraulic actuator adjusts the inclination angle of the dewatering plate according to the optimal value.
Referring to fig. 6, which is a logic flow chart of the optimization method provided by the present invention, as shown in fig. 6, after the optimization system is switched into automatic operation, the dewatering plate increases the opening Δ s2 of the hydraulic proportional valve from 0 by a unit time Δ t2, and the dewatering effect graph of the average flow rate in the unit time Δ t2 from 0-100% of the opening of the hydraulic proportional valve is calculated by the instantaneous flow rate of the flow sensor of the vacuum suction box.
Further, the hydraulic proportional valve opening is reduced, and the hydraulic proportional valve opening is increased by a predetermined unit Δ s 1. And (3) entering the next pulp evenness detection step every time the opening degree is increased, returning to the previous step to continuously increase the opening degree if the opening degree is qualified, and using the opening degree value S of the previous step, namely the first opening degree S1 if the opening degree is not qualified, wherein the first opening degree S1 is the optimal inclination angle adjustment angle.
In the specific working process of the optimization method provided by the embodiment of the invention, after the optimization system is switched into automation, the control module 402 sends out a command, increases the opening signal Δ s2 for a time Δ t2, and enables the hydraulic proportional valve to move from 0 to 100%. As 2 can be preset, the smaller the value, the more accurate the dehydration effect graph. The hydraulic proportional valve is connected with the dewatering plate through a mechanical structure, wherein the mechanical structure only needs to adopt a structure for adjusting the angle of the dewatering plate in the prior art, and the description is omitted; when the hydraulic proportional valve is 0-100% opened, the inclination angle of the dewatering plate follows the hydraulic proportional valve from the minimum working angle to the maximum working angle. Keeping the fourth opening degree S4 unchanged, calculating the average flow rate in the time of delta t2 through the real-time instantaneous flow rate obtained by the flow sensor of the vacuum suction box. And taking the opening degree signal as an x axis and the average flow rate as a y axis to obtain a dehydration effect curve graph.
Further, the opening signal is reduced to be 0 or a preset value, and the opening is increased within the range of 0-a according to a certain opening unit delta s1, wherein a is the preset opening, and the time of delta t1 is required to be kept every time the opening is increased. Keeping a certain time delta t1 ensures that the dewatering flow of the wire section is measured under stable working conditions and is matched with a dewatering effect curve chart. And the control module collects and analyzes the collected pulp formation parameter n every time the opening unit delta s1 is increased. And returning to the previous step to continue increasing the opening unit delta s1 once when the pulp formation is qualified until the pulp formation is unqualified. The S value of the previous round is the maximum dewatering opening value under the condition of not disturbing the paper pulp, and the program flow is stopped. In a few cases, the pulp formation is still qualified when the opening degree S2 is greater than a, and the opening degree S2 is the preset opening degree a. And the opening signal s is output to the hydraulic proportional valve through the signal output module.
Further, in the embodiment of the present invention, the control module actively records the relevant parameters and the trend chart (such as the dewatering effect graph, Δ t1, Δ s1, the opening signal s, the maximum dewatering opening a, the pulp formation parameters, etc.). In the manual case, the staff can refer to the relevant value and directly give the opening signal, and the control module does not perform adjustment control at this time. Under the condition that the working condition does not change greatly, the worker can switch the mode into manual mode and give the opening degree in the last production.
In a second aspect, the present invention provides a wire section dewatering element intelligent optimization system for performing the optimization method as provided above, as shown in fig. 4, in an embodiment of the invention, the optimization system 400 comprises:
a signal acquisition module 401, configured to acquire operation data, where the operation data includes pulp uniformity, water tank flow rate, and proportional valve opening;
a control module 402, configured to collect the operation data, and analyze and process the operation data according to the optimization method to obtain an optimal value of the opening of the hydraulic proportional valve;
a signal output module 403, configured to adjust the inclination angle of the dewatering plate according to the optimal value;
a power module 404, configured to supply power to the signal acquisition module 401, the control module 402, and the signal output module 403.
Referring to fig. 4, in some embodiments of the present invention, the signal acquisition module 401 and the control module 402 establish a communication connection through a first communication module 405, and the operation data acquired by the signal acquisition module 401 is sent to the control module 402 through the first communication module 405.
Referring to fig. 4, in some embodiments of the present invention, the control module 402 and the signal output module 403 establish a communication connection through a second communication module 406, and the optimal value of the opening degree of the hydraulic proportional valve obtained by the control module 402 is sent to the signal output module 403 through the second communication module 406.
Referring to fig. 4, in some embodiments of the present invention, the signal acquisition module 401 includes: a pulp formation scanning rack 4011 for collecting pulp formation; a suction box flow sensor 4012 for collecting a tank flow; a proportional valve opening sensor 4013 for acquiring a proportional valve opening.
With continued reference to fig. 4, in some embodiments provided by the present invention, the control module 402 is a computer device including a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the optimization method.
In another embodiment of the present invention, the control module 402 and the computer device may be independent from each other, and perform two processes independently, and perform data transmission interaction between the two processes through the communication module.
Continuing to refer to fig. 4, in some embodiments provided by the present invention, the signal output module 403 is a hydraulic actuator for adjusting the inclination angle of the dewatering plates according to the optimal value.
In another embodiment of the present invention, the signal output module 403 and the hydraulic actuator are two independent modules, the signal output module 403 is configured to send a control signal to the hydraulic actuator, the hydraulic actuator is configured to execute the control signal, and the control signal is a signal for controlling the operation of the dewatering plate.
In summary, the intelligent optimization method and system for the dewatering elements of the wire section provided by the invention have the technical advantages that: the optimization method and the system provided by the invention are used for adjustment, the operation is simple and convenient, the control module of the system can automatically adjust a proper angle according to real-time process parameters by pressing a button by an operator, compared with the traditional method for manually setting the angle of the inclination angle, the system is stricter and more accurate in the test process, the obtained inclination angle is better in dehydration effect, the control module stores relevant parameters and curves in the adjustment process, and the adjustment can be completed without a large number of tests under the condition of changing the working condition.
In a typical configuration of an embodiment of the present invention, the terminal, the device serving the network, and the computing device include one or more processors (CPUs), input/output interfaces, network interfaces, and memories.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for intelligent optimization of wire dewatering elements, characterized in that the optimization method comprises the steps of:
step S101, acquiring a first opening degree S1 of the hydraulic proportional valve, increasing the first opening degree S1 according to the opening degree delta S1 to obtain a second opening degree S2, and increasing and continuing the second opening degree S2 for unit time delta t 1;
step S102, when the second opening degree S2 is smaller than a preset opening degree a, executing step S103;
when the second opening degree S2 is not less than the preset opening degree a, executing step S104;
step S103: measuring the paper pulp evenness to obtain a paper pulp evenness measuring result;
when the measured result of the pulp evenness is qualified, executing a step S101;
when the measured result of the pulp evenness is unqualified, executing step S104;
step S104: the first opening degree S1 is set as an optimum value of the hydraulic proportional valve opening degree.
2. The intelligent optimization method of wire section dewatering elements according to claim 1, characterized in that the preset opening degree a is obtained in a way that comprises the following steps:
the third opening degree S3 is increased by an opening degree Δ S2 per unit time Δ t2 to obtain a fourth opening degree S4;
calculating the average flow rate of the third opening degree S3 in the unit time delta t2 from 0-100% based on the instantaneous flow rate of the flow sensor of the suction box, and generating a dehydration effect curve;
and determining the preset opening a when the average flow is the maximum value according to the dehydration effect curve.
3. The intelligent optimization method of wire section dewatering elements according to claim 2, characterized in that the step of calculating the average flow rate per unit time at 2 from 0-100% of the third opening degree S3 and generating a dewatering effect curve comprises:
and keeping the fourth degree S4, calculating the real-time instantaneous flow obtained by the flow sensor of the vacuum suction box to obtain the average flow in unit time delta t2, and obtaining a dehydration effect curve graph by taking the opening degree signal as an x axis and the average flow as a y axis.
4. A method for intelligent optimization of wire section dewatering elements according to any of claims 1-3, characterized in that the optimization method further comprises the steps of:
sending the optimal value of the opening of the hydraulic proportional valve to a hydraulic actuator on the dewatering plate;
and the hydraulic actuator adjusts the inclination angle of the dewatering plate according to the optimal value.
5. An intelligent optimization system for wire section dewatering elements, characterized in that the optimization system is adapted to perform the optimization method according to any one of claims 1-4, the optimization system comprising:
the signal acquisition module is used for acquiring operation data, and the operation data comprises pulp evenness, water tank flow and proportional valve opening;
the control module is used for collecting the operation data and analyzing and processing the operation data according to the optimization method to obtain an optimal value of the opening of the hydraulic proportional valve;
the signal output module is used for adjusting the inclination angle of the dewatering plate according to the optimal value;
and the power supply module is used for supplying power to the signal acquisition module, the control module and the signal output module.
6. The intelligent wire section dewatering element optimization system of claim 5, wherein the signal acquisition module is communicatively coupled to the control module via a first communication module, and wherein operational data acquired by the signal acquisition module is sent to the control module via the first communication module.
7. The intelligent wire section dewatering element optimization system of claim 5, wherein the control module and the signal output module are communicatively connected through a second communication module, and the optimal value of the opening of the hydraulic proportional valve obtained by the control module is sent to the signal output module through the second communication module.
8. The wire section dewatering element smart optimization system of claim 5, wherein the signal acquisition module comprises:
the paper pulp evenness scanning frame is used for collecting paper pulp evenness;
the flow sensor of the suction box is used for collecting the flow of the water tank;
and the proportional valve opening sensor is used for acquiring the proportional valve opening.
9. The intelligent wire section dewatering element optimization system of claim 8, wherein the control module is a computer device including a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the optimization method.
10. The intelligent wire section dewatering element optimization system of claim 9, wherein the signal output module is a hydraulic actuator for adjusting the inclination angle of the dewatering plates according to the optimal value.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1187730A (en) * | 1983-01-10 | 1985-05-28 | Peter Eustacchio | Regulating apparatus for dewatering machines |
| US5530346A (en) * | 1992-06-09 | 1996-06-25 | Valmet-Tampella Oy | Method and apparatus for determining the size and shape of a slot by measuring a magnetic field produced along an edge thereof |
| CA2224878A1 (en) * | 1996-04-18 | 1997-10-23 | Valmet Corporation | Method for overall regulation of the headbox and/or the former of a paper machine or equivalent |
| US5825653A (en) * | 1997-03-14 | 1998-10-20 | Valmet Corporation | Method for overall regulation of a former of a paper machine or equivalent |
| JP2004332131A (en) * | 2003-04-30 | 2004-11-25 | Mitsubishi Heavy Ind Ltd | Paper machine and paper-making method |
-
2021
- 2021-12-15 CN CN202111539963.5A patent/CN114182562B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1187730A (en) * | 1983-01-10 | 1985-05-28 | Peter Eustacchio | Regulating apparatus for dewatering machines |
| US5530346A (en) * | 1992-06-09 | 1996-06-25 | Valmet-Tampella Oy | Method and apparatus for determining the size and shape of a slot by measuring a magnetic field produced along an edge thereof |
| CA2224878A1 (en) * | 1996-04-18 | 1997-10-23 | Valmet Corporation | Method for overall regulation of the headbox and/or the former of a paper machine or equivalent |
| US5825653A (en) * | 1997-03-14 | 1998-10-20 | Valmet Corporation | Method for overall regulation of a former of a paper machine or equivalent |
| JP2004332131A (en) * | 2003-04-30 | 2004-11-25 | Mitsubishi Heavy Ind Ltd | Paper machine and paper-making method |
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