CN114326573B - Continuous slurry preparation method and system based on PLC system - Google Patents
Continuous slurry preparation method and system based on PLC system Download PDFInfo
- Publication number
- CN114326573B CN114326573B CN202111607769.6A CN202111607769A CN114326573B CN 114326573 B CN114326573 B CN 114326573B CN 202111607769 A CN202111607769 A CN 202111607769A CN 114326573 B CN114326573 B CN 114326573B
- Authority
- CN
- China
- Prior art keywords
- pulp
- value
- control valve
- flow control
- raw material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The application relates to the technical field of papermaking, and particularly provides a continuous pulp mixing method and system based on a PLC system, wherein the method comprises the following steps: obtaining the adding proportion and the set yield value of each raw material in the mixed slurry pool; generating a set value of a flow control valve on a feeding pipeline of each raw material and a set value of a flow control valve on a sizing system based on the addition proportion of each raw material and a preset yield value; controlling the flow of each raw material by a PLC based on the set value of each flow control valve; the application discloses a continuous pulp mixing method and a continuous pulp mixing system based on a PLC system, which enable raw materials to be automatically and continuously mixed in a mixed pulp tank in the papermaking process, thereby saving labor cost.
Description
Technical Field
The application relates to the technical field of papermaking, in particular to a continuous pulp mixing method and system based on a PLC system.
Background
In the paper mill, the variety of the produced paper can be produced according to the requirements of customers, the proportion of long and short fibers needed by the paper of different varieties is different, or the same paper is often required to be adjusted for the quantity of the damaged paper pulp, the stability of the sizing process is ensured, the liquid level of a mixed pulp tank is also controlled in a stable range, the situation of stopping pulp is low, the mixed pulp tank is easy to overflow, the fluctuation is large, the unstable pulp outlet pressure is caused, and the unstable whole sizing is caused, so that a set of system capable of automatically mixing pulp and ensuring continuous production is particularly important.
The pulp is often manually mixed in a paper mill, namely, operators set pulp mixing amount, data are inaccurate, current yield cannot be reflected in real time, and meanwhile, operators are required to frequently check the current mixed pulp pool liquid level value, so that the situation of pulp overflow is prevented; the effect of continuous automatic slurry preparation cannot be achieved. Therefore, the application provides a continuous slurry preparation method and system based on a PLC system.
Disclosure of Invention
The application aims to provide a continuous slurry preparation method and a continuous slurry preparation system based on a PLC system, so as to solve the problem that the conventional slurry preparation technology cannot continuously and automatically prepare slurry.
In order to achieve the above purpose, the present application provides the following technical solutions:
a continuous slurry preparation method based on a PLC system comprises the following steps:
obtaining the adding proportion and the set yield value of each raw material in the mixed slurry pool;
generating a set value of a flow control valve on a feeding pipeline of each raw material and a set value of a flow control valve on a sizing system based on the addition proportion of each raw material and a preset yield value;
the flow rate of each raw material and the flow rate of the sizing system are controlled by a PLC controller based on the set values of the flow control valves.
Preferably, the method for obtaining the set value of the flow control valve on the feeding pipeline of each raw material and the set value of the flow control valve on the sizing system comprises the following steps:
acquiring a concentration value of paper pulp entering a sizing system;
acquiring a set value of a flow control valve on a sizing system based on a concentration value of pulp in the sizing system;
and calculating the set value of the flow control valve on the feeding pipeline of each raw material based on the addition proportion and the revision coefficient of each raw material in the mixed slurry tank.
Preferably, the set value of the flow control valve on the sizing system is obtained by the formula (1):
wherein, fic4.sp represents the set point of the flow control valve on the sizing system;
prod.sp represents a set yield value:
cic1.Pv represents the pulp consistency value in the sizing system.
Preferably, the set values of the flow control valves on the feeding pipeline of each raw material are respectively represented by formula (2), formula (3) and formula (4):
fic1.sp=fic4.sp×k×lf, formula (2);
fic2.sp=fic4.sp×k×sf, formula (3);
fic3.sp=fic4.sp×k×rf, equation (4);
wherein, FIC1.SP is the set value of the flow control valve on the long fiber slurry pipeline, LF is the proportion value of the long fiber slurry;
FICC 2.SP is the set value of the flow control valve on the fluff pulp pipeline, SF is the proportion value of fluff pulp addition;
fic3.sp is the setting value of the flow control valve on the broke pulp line, RF is the ratio of broke pulp addition;
k is a revision coefficient.
Preferably, the revision coefficient is obtained by:
acquiring preset values P1, P2, K1 and K2;
obtaining an output value of a PID control loop of the mixed slurry tank;
calculating a revision coefficient K based on formula (5);
wherein, P1, P2, K1 and K2 are all with the default value, LIC1.OUT is the output value of the PID loop of the mixing pulp pool.
The application also discloses a continuous slurry preparation system based on the PLC system, which comprises:
the acquisition unit is used for acquiring setting parameters and actual flow values of the flow control valves, wherein the setting parameters are the addition proportion of the raw materials and the set yield values;
a calculation unit for calculating the set value of each flow control valve according to the set parameters;
the control unit is used for controlling the flow of each raw material and the flow of the sizing system according to the set value of each flow control valve;
the acquisition unit is electrically connected with the calculation unit to transmit the numerical value, and the calculation unit is electrically connected with the control unit to transmit the numerical value.
Further, the acquisition unit includes:
the input module is used for inputting setting parameters;
the collecting module is used for collecting the feeding flow of each raw material, the flow of the sizing system, the concentration of paper pulp in the sizing system and the liquid level of the mixed pulp pool;
the input module and the acquisition module can be set separately and can be an integrated machine.
Further, the control unit includes:
the execution module is used for controlling the feeding flow of each raw material and the sizing flow of the sizing system;
the PLC is used for sending out control signals;
and the PID controller is used for controlling the execution module according to the control signal of the PLC.
In summary, compared with the prior art, the application has the following beneficial effects:
1. according to the continuous pulp mixing method based on the PLC system, disclosed by the embodiment of the application, the addition proportion and the set yield value of each raw material in the mixed pulp tank are obtained, the set value of the flow control valve on the feeding pipeline of each raw material and the set value of the flow control valve on the sizing system are generated based on the addition proportion and the preset yield value of each raw material, then the flow of each raw material and the flow of the sizing system are controlled by the PLC controller based on the set value of each flow control valve, and the raw material is automatically and continuously mixed in the mixed pulp tank in the papermaking process by controlling the inlet flow of the raw material in the mixed pulp tank, so that the labor cost is saved.
2. The continuous pulp mixing method based on the PLC system disclosed by the embodiment of the application has the advantages of high raw material adding precision and full-process automation, meanwhile, the raw material mixing amount and the yield adaptation degree are high, larger raw material waste can not be generated, and the full-automatic mixing method also improves the production efficiency of papermaking.
Drawings
Fig. 1 is a schematic structural diagram of a continuous slurry mixing system based on a PLC system according to the present disclosure.
Fig. 2 is a flow chart of a continuous slurry preparation system based on a PLC system according to the present disclosure.
Fig. 3 is a block flow diagram of a continuous slurry preparation method based on a PLC system according to the present disclosure.
Fig. 4 is a flow chart of one of the subroutines of the PLC system-based continuous slurry preparation method of the present application.
Fig. 5 is a graph showing the K value in the continuous slurry preparation method based on the PLC system according to the present application.
Fig. 6 is a block diagram of a continuous slurry mixing system based on a PLC system according to the present disclosure.
Fig. 7 is a control logic diagram of a PID controller in a PLC system-based continuous slurry mixing system according to the present application.
Detailed Description
The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present application are included in the protection scope of the present application.
The pulp is often manually mixed in a paper mill, namely, operators set pulp mixing amount, data are inaccurate, current yield cannot be reflected in real time, and meanwhile, operators are required to frequently check the current mixed pulp pool liquid level value, so that the situation of pulp overflow is prevented; the effect of continuous automatic slurry preparation cannot be achieved. Therefore, the application provides a continuous slurry preparation method and system based on a PLC system.
Example 1
Fig. 3 shows a continuous slurry preparation method based on a PLC system according to an embodiment of the present application, including the following steps:
step S100, obtaining the addition proportion and the set yield value of each raw material in the mixed slurry tank;
specifically, as shown in fig. 2, in the continuous pulp blending method based on the PLC system disclosed in the embodiment of the present application, the addition ratio of each raw material and the set yield value in the pulp blending process are manually input or obtained from the cloud end during operation, for example, the addition ratio of long fiber pulp, the addition ratio of short fiber pulp and the addition ratio of damaged pulp are used during pulp configuration;
wherein, the set yield value is the papermaking amount generated in the current pulp mixing process;
in some examples, the addition proportion and the set yield value of each raw material can be input through an upper computer and can be pre-stored in a production plan of a cloud end, and the addition proportion and the set yield value of each raw material are obtained through connecting the cloud end in the papermaking process;
step 200, generating a set value of a flow control valve on a feeding pipeline of each raw material and a set value of a flow control valve on a sizing system based on the addition proportion of each raw material and a preset yield value;
specifically, in this embodiment, based on the addition ratio of each raw material and the preset yield value obtained in step S100, the flow rate of the sizing system is calculated by the preset yield value to control the discharge amount of the mixed slurry tank, and then the flow rate of each raw material is calculated based on the flow rate of the sizing system to control the feed amount of the mixed slurry tank;
the set value of the flow control valve on the feeding pipeline of each raw material and the set value of the flow control valve on the sizing system are obtained through the calculation, so that the feeding flow of each raw material and the discharging flow of the sizing system are controlled, the feeding quantity and the discharging quantity in the mixed pulp tank are balanced, and the pulp in the mixed pulp tank is prevented from overflowing;
as a preferred implementation manner in this embodiment, as shown in fig. 4, the method for obtaining the set value of the flow control valve on the feeding line of each raw material and the set value of the flow control valve on the sizing system is as follows:
step S210, obtaining a concentration value of paper pulp entering a sizing system;
step S220, acquiring a set value of a flow control valve on the sizing system based on a concentration value of pulp in the sizing system;
step S230, calculating the set value of a flow control valve on a feeding pipeline of each raw material based on the addition proportion and the revision coefficient of each raw material in the mixed slurry tank;
specifically, the concentration of the pulp in the sizing system is obtained by a concentration meter arranged on a feeding pipe of the sizing system, for example, the concentration of the pulp is obtained by a concentration meter on the sizing system, and the concentration meter is connected to an upper computer through a network;
after the upper computer obtains the concentration of the paper pulp, calculating the flow of the system, namely the set value of a flow control valve on the sizing system, based on a formula (5) so as to control the flow of the sizing system;
prod.sp=cic 1.pv×fic4.sp×24/100, equation (5);
wherein: fic4.sp represents the set point of the flow control valve on the sizing system; PROD.SP represents a set yield value, CIC1.PV represents the concentration value of paper pulp in the sizing system and is obtained by a concentration meter;
after the set value of the flow control valve on the system is calculated, as the original feed quantity and the discharge quantity of the mixed slurry tank reach balance, the set value of the flow control valve on the feeding pipeline of each raw material can be calculated through a calculation formula (6) and the addition proportion of each raw material;
fic4.sp×k=fic1.sp+fic2.sp+fic3.sp, equation (6);
wherein, FICC 1.SP is the set value of the flow control valve on the long fiber slurry pipeline; FICC 2.SP is the set point of the flow control valve on the fluff pulp line; fic3.sp is the set point of the flow control valve on the broke pulp line;
the correction coefficient K is introduced to ensure the stable liquid level of the mixed pulp tank and prevent the pulp in the mixed pulp tank from overflowing or being lower than a safe value under the condition of ensuring that the set sizing amount is reached;
preferably, the set value of the flow control valve on the sizing system is obtained by the formula (1):
wherein, fic4.sp represents the set point of the flow control valve on the sizing system;
prod.sp represents a set yield value:
cic1.Pv represents the pulp consistency value in the sizing system;
specifically, the formula (1) is deformed from the formula (5), and the set value of the flow control valve on the sizing system can be obtained by inputting the set value of the yield according to the formula (1);
the set values of the flow control valves on the feeding pipelines of the raw materials are respectively represented by the formula (2), the formula (3) and the formula (4):
fic1.sp=fic4.sp×k×lf, formula (2);
fic2.sp=fic4.sp×k×sf, formula (3);
fic3.sp=fic4.sp×k×rf, equation (4);
wherein, FIC1.SP is the set value of the flow control valve on the long fiber slurry pipeline, LF is the proportion value of the long fiber slurry;
FICC 2.SP is the set value of the flow control valve on the fluff pulp pipeline, SF is the proportion value of fluff pulp addition;
fic3.sp is the setting value of the flow control valve on the broke pulp line, RF is the ratio of broke pulp addition;
k is a revision coefficient;
in this embodiment, the formulas (2), (3) and (4) are deformed from the formula (5), the pulp in the mixed pulp tank is composed of long pulp, short pulp and damaged pulp, the proportions of the long pulp, the short pulp and the damaged pulp are set by the staff according to the paper type, the proportions of the long pulp, the short pulp and the damaged pulp are obtained in the step S100, and the sum of the long pulp, the short pulp and the damaged pulp is the pulp in the mixed pulp, the flow rate of the discharged material in the mixed pulp tank is the sum of the flow rates of the fed material of the long pulp, the short pulp and the damaged pulp, and the respective feed rates of the long pulp, the short pulp and the damaged pulp can be obtained through the adding proportions of the long pulp, the short pulp and the damaged pulp and the flow rates of the discharged material in the mixed pulp tank;
as a preferred implementation manner in this embodiment, the revision coefficient is obtained by the following steps:
step S231, obtaining preset values P1, P2, K1 and K2;
step S232, obtaining an output value of a PID control loop of the mixed slurry tank;
step S233, calculating a revision coefficient K based on a formula (5);
wherein, P1, P2, K1 and K2 are all the same as the preset value, LIC1.OUT is the output value of the PID loop of the mixing pulp pool;
specifically, in this step, preset values P1, P2, K1 and K2 are first obtained, where the preset values P1, P2, K1 and K2 are used to set ranges and values to determine the K value, and the preset values P1, P2, K1 and K2 are set by a staff based on an empirical method;
by comparing the output values LIC1.OUT of the PID controllers in the PID control loop in the sizing system with the values of P1 and P2, respectively selecting different formulas to obtain a K value;
as shown in fig. 5, a graph of the K value is shown;
in this embodiment, the liquid level PID of the mixing tank is positive, i.e. when the liquid level in the mixing tank is smaller than the set value, the lic1.out value increases, whereas it decreases; when LIC1.OUT is between O-P1, it shows that the actual liquid level value in the mixed slurry tank is higher than the set value, and then the K value is definitely smaller than 1, so that the slurry feeding amount is smaller than the sizing amount; when LIC1.OUT is between P1-P2, it shows that the actual liquid level value in the mixed slurry tank is stable within the set value range, then K is 1, and the slurry inlet amount is equal to the slurry outlet amount; when LIC1.OUT is between P2-100, the actual liquid level value in the mixed slurry tank is continuously lower than the set value, and the slurry inlet amount is larger than the slurry feeding amount to increase the liquid level of the mixed slurry tank;
preferably, in the present embodiment, a calculated product value is also calculated and output, wherein the calculated product value is obtained by the formula (7):
prod.act=cic 1.pv×fic4.pv×24/100, equation (7);
wherein, fic4.sp represents the set point of the flow control valve on the sizing system; prod.act represents a calculated yield value; cic1.Pv represents the pulp consistency value in the sizing system;
step S300, controlling the flow of each raw material and the flow of the sizing system by a PLC (programmable logic controller) based on the set value of each flow control valve;
specifically, as shown in fig. 7, in step S200, the set value of the flow control valve on the feeding pipeline of each raw material and the set value of the flow control valve on the sizing system are calculated, and sent to the PLC controller by the upper computer, and then sent to PID control loops in the feeding pipeline and the sizing system by the PLC controller, and each PID control loop controls the flow of each pipeline by detecting an actuator on the differential control pipeline of the actual value and the set value;
according to the continuous pulp mixing method based on the PLC system, disclosed by the application, the adding proportion and the set yield value of each raw material in the mixed pulp tank are collected, the set value of the flow control valve on the feeding pipeline of each raw material and the set value of the flow control valve on the sizing system are generated based on the adding proportion and the preset yield value of each raw material, then the flow of each raw material and the flow of the sizing system are controlled by the PLC controller based on the set value of each flow control valve, and the raw material is automatically and continuously mixed in the mixed pulp tank in the papermaking process by controlling the inlet flow of the raw material in the mixed pulp tank, so that the labor cost is saved, the whole process of the mixing process is automatic, the raw material mixing amount and the yield adaptation degree are high, no great raw material waste is generated, and the full-automatic mixing method also improves the papermaking production efficiency.
Example 2
The application also discloses a continuous slurry preparation system based on the PLC system, as shown in FIG. 6, the system 400 comprises:
an obtaining unit 401, configured to obtain a setting parameter and an actual flow value of each flow control valve, where the setting parameter is an addition ratio and a set yield value of each raw material;
a calculation unit 402 for calculating the set value of each flow control valve according to the set parameter;
a control unit 403 for controlling the flow rate of each raw material and the flow rate of the sizing system according to the set values of the flow control valves;
the acquiring unit 401 is electrically connected with the calculating unit 402 to transmit a value, and the calculating unit 402 is electrically connected with the control unit 403 to transmit a value;
in the present embodiment, the acquiring unit 401 acquires the setting parameters and the actual flow values of the flow control valves and sends them to the calculating unit 402;
in some examples, the acquisition unit 401 includes:
the input module is used for inputting setting parameters;
the collecting module is used for collecting the feeding flow of each raw material, the flow of the sizing system, the concentration of paper pulp in the sizing system and the liquid level of the mixed pulp pool;
the input module is an input device arranged on the upper computer, such as a keyboard, a mouse, a touch pad and the like, and when the set parameters are input, a worker respectively inputs the input proportion of the long fiber pulp, the short fiber pulp and the damaged pulp and the set yield value through the input module;
in some examples, the input module may also be an acquisition program, such as code for establishing communication with a database, for acquiring input ratios and set yield values for the long-, short-, and damaged pulps stored in the database;
the acquisition module is a sensor arranged on each pipeline, such as a flowmeter arranged on a sizing system, a long fiber pulp feeding pipeline, a short fiber pulp feeding pipeline and a broken pulp feeding pipeline, a concentration meter arranged in the sizing system, a liquid level meter arranged on a mixed pulp pool and the like, and is used for acquiring parameters required by the continuous pulp preparation method based on the PLC system described in the embodiment 1;
further, the control unit includes:
the execution module is used for controlling the feeding flow of each raw material and the sizing flow of the sizing system;
the PLC is used for sending out control signals;
the PID controller is used for controlling the execution module according to the control signal of the PLC;
in this embodiment, as shown in fig. 1, the execution module is an execution structure set on each pipeline, for example, a sizing pump set on a sizing system, and flow control valves set on a long fiber pulp feeding pipeline, a short fiber pulp feeding pipeline and a damaged pulp feeding pipeline;
illustratively, as shown in FIG. 1, the system 400 includes:
a mixing chest for mixing raw stock slurries, such as long fiber slurry, short fiber slurry, and broken pulp;
the raw material feeding pipeline is arranged on the mixed slurry tank and is used for injecting raw materials into the mixed slurry tank;
the PID control loop is arranged on each raw material pipeline and is used for controlling the feeding flow of each raw material;
the liquid level control loop is arranged on the mixed slurry tank and is used for controlling the liquid level on the mixed slurry tank;
the sizing module is arranged in the mixed slurry tank and is used for sizing;
the PLC is electrically connected with the upper computer through a network, and is electrically connected with each PID control loop, each liquid level control loop and each sizing module through a network in a backflow control manner;
the PID control loop comprises a first PID controller, a first flowmeter and a flow control valve, wherein the flow control valve and the first flowmeter are electrically connected with the first PID controller through wires, and the first PID controller controls the flow control valve based on the detected flow of the first flowmeter;
the liquid level control loop comprises a liquid level meter arranged on the mixed slurry tank and a second PID controller electrically connected with the liquid level meter, and the second PID controller is electrically connected with the PID control loop and the PLC controller;
the sizing module comprises a sizing pump, a third PID controller, a concentration meter and a second flowmeter, wherein the sizing pump is electrically connected with the third PID controller through a wire, the second flowmeter is electrically connected with the third PID controller through a wire, and the third PID controller is electrically connected with the PLC controller through a network;
as a preferred implementation of this embodiment, as shown in fig. 1, the system 400 further includes:
a consistency adjustment module for adjusting a consistency of pulp in a sizing system, the consistency adjustment module comprising:
the first control valve is connected with the concentrate adjusting water and is used for controlling the flow of the concentrate adjusting water;
the pulp mixing pump is arranged at the downstream of the first control valve and is used for mixing the thickening water and the pulp in the pulp mixing tank;
a concentration meter provided downstream of the mixed pulp pump for detecting the concentration of pulp supplied into the sizing system;
a third flowmeter for detecting the concentration of the enriched water;
a fourth PID controller for controlling the first control valve flow;
the third flowmeter is electrically connected with the fourth PID controller through a wire, the slurry mixing pump is electrically connected with the PLC controller through a wire, the first control valve is electrically connected with the fourth PID controller through a wire, and the fourth PID controller is electrically connected with the PLC controller through a network.
Example 3
The application also discloses a computer program stored therein, which when executed by a processor, causes the processor to execute the continuous slurry preparation method based on the PLC system described in the embodiment 1.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data.
Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include non-transitory computer-readable media (transmission-media), such as modulated data signals and carrier waves.
The foregoing description of the preferred embodiments of the application is not intended to limit the application to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the application are intended to be included within the scope of the application.
Claims (4)
1. The continuous slurry preparation method based on the PLC system is characterized by comprising the following steps of:
obtaining the adding proportion and the set yield value of each raw material in the mixed slurry pool;
generating a set value of a flow control valve on a feeding pipeline of each raw material and a set value of a flow control valve on a sizing system based on the addition proportion of each raw material and a preset yield value;
controlling the flow of each raw material by a PLC based on the set value of each flow control valve;
the method for acquiring the set value of the flow control valve on the feeding pipeline of each raw material comprises the following steps:
acquiring a concentration value of paper pulp entering a sizing system;
acquiring a set value of a flow control valve on a sizing system based on a concentration value of pulp in the sizing system;
calculating the set value of a flow control valve on a feeding pipeline of each raw material based on the addition proportion and the revision coefficient of each raw material in the mixed slurry tank;
the set value of the flow control valve on the sizing system is obtained by the formula (1):
wherein, fic4.sp represents the set point of the flow control valve on the sizing system;
prod.sp means a set yield value;
cic1.Pv represents the pulp consistency value in the sizing system;
the set values of the flow control valves on the feeding pipelines of the raw materials are respectively represented by the formula (2), the formula (3) and the formula (4):
fic1.sp=fic4.sp×k×lf, formula (2);
fic2.sp=fic4.sp×k×sf, formula (3);
fic3.sp=fic4.sp×k×rf, equation (4);
wherein, FIC1.SP is the set value of the flow control valve on the long fiber slurry pipeline, LF is the proportion value of the long fiber slurry;
FICC 2.SP is the set value of the flow control valve on the fluff pulp pipeline, SF is the proportion value of fluff pulp addition;
fic3.sp is the setting value of the flow control valve on the broke pulp line, RF is the ratio of broke pulp addition;
k is a revision coefficient;
the revision coefficient is obtained by:
acquiring preset values P1, P2, K1 and K2;
obtaining an output value of a PID control loop of the mixed slurry tank;
calculating a revision coefficient K based on formula (5);
wherein, P1, P2, K1 and K2 are all preset values, and LIC1.OUT is the output value of the PID loop of the mixing pulp tank.
2. A PLC system-based continuous slurry preparation system for implementing the PLC system-based continuous slurry preparation method of claim 1, comprising:
the acquisition unit is used for acquiring setting parameters and actual flow values of the flow control valves, wherein the setting parameters are the addition proportion of the raw materials and the set yield values;
a calculation unit for calculating the set value of each flow control valve according to the set parameters;
and the control unit is used for controlling the flow of each raw material and the flow of the sizing system according to the set value of each flow control valve.
3. The PLC system-based continuous slurry preparation system according to claim 2, wherein the acquisition unit includes:
the input module is used for inputting setting parameters;
the collection module is used for collecting the feeding flow of each raw material, the flow of the sizing system, the concentration of paper pulp in the sizing system and the liquid level of the mixed pulp pool.
4. The PLC system-based continuous slurry distribution system according to claim 2, wherein the control unit includes:
the execution module is used for controlling the feeding flow of each raw material and the sizing flow of the sizing system;
the PLC is used for sending out control signals;
and the PID controller is used for controlling the execution module according to the control signal of the PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111607769.6A CN114326573B (en) | 2021-12-24 | 2021-12-24 | Continuous slurry preparation method and system based on PLC system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111607769.6A CN114326573B (en) | 2021-12-24 | 2021-12-24 | Continuous slurry preparation method and system based on PLC system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114326573A CN114326573A (en) | 2022-04-12 |
| CN114326573B true CN114326573B (en) | 2023-10-10 |
Family
ID=81013297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111607769.6A Active CN114326573B (en) | 2021-12-24 | 2021-12-24 | Continuous slurry preparation method and system based on PLC system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114326573B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115453992A (en) * | 2022-09-06 | 2022-12-09 | 浙江华章科技有限公司 | Remote one-key automatic production transfer control system and method for high-speed toilet paper machine |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5745609A (en) * | 1980-08-29 | 1982-03-15 | Mitsubishi Heavy Ind Ltd | Information input and command device of automatic measurement correction in nc machine tool |
| WO1983000816A1 (en) * | 1981-09-04 | 1983-03-17 | Weyerhaeuser Co | Method and apparatus for mixing pulp with oxygen |
| JPH06184972A (en) * | 1992-12-14 | 1994-07-05 | Yokogawa Electric Corp | Device for controlling bleaching of pulp |
| CN201155068Y (en) * | 2008-03-27 | 2008-11-26 | 中国轻工业长沙工程有限公司 | Broke processing equipment at net part of paper-making machine |
| CN204151612U (en) * | 2014-09-22 | 2015-02-11 | 东莞玖龙纸业有限公司 | A kind of machine broke treating apparatus |
| CN205288310U (en) * | 2015-11-20 | 2016-06-08 | 重庆恒宇华顿新能源开发有限公司 | Blending tank body DCS control platform |
| US10088837B1 (en) * | 2014-10-14 | 2018-10-02 | Neo PLM, Inc. | Process design and management system |
| CN110409206A (en) * | 2019-08-01 | 2019-11-05 | 浙江华章科技有限公司 | A kind of automatic control system and its operation method of papermaking pulping section |
| CN210544944U (en) * | 2019-09-11 | 2020-05-19 | 安徽省萧县林平纸业有限公司 | Unattended closed-loop streaming system |
| WO2021249119A1 (en) * | 2020-06-11 | 2021-12-16 | 广东省金叶科技开发有限公司 | Thick pulp papermaking method-based reconstituted tobacco quantitative control system and control method, and producing system |
-
2021
- 2021-12-24 CN CN202111607769.6A patent/CN114326573B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5745609A (en) * | 1980-08-29 | 1982-03-15 | Mitsubishi Heavy Ind Ltd | Information input and command device of automatic measurement correction in nc machine tool |
| WO1983000816A1 (en) * | 1981-09-04 | 1983-03-17 | Weyerhaeuser Co | Method and apparatus for mixing pulp with oxygen |
| JPH06184972A (en) * | 1992-12-14 | 1994-07-05 | Yokogawa Electric Corp | Device for controlling bleaching of pulp |
| CN201155068Y (en) * | 2008-03-27 | 2008-11-26 | 中国轻工业长沙工程有限公司 | Broke processing equipment at net part of paper-making machine |
| CN204151612U (en) * | 2014-09-22 | 2015-02-11 | 东莞玖龙纸业有限公司 | A kind of machine broke treating apparatus |
| US10088837B1 (en) * | 2014-10-14 | 2018-10-02 | Neo PLM, Inc. | Process design and management system |
| CN205288310U (en) * | 2015-11-20 | 2016-06-08 | 重庆恒宇华顿新能源开发有限公司 | Blending tank body DCS control platform |
| CN110409206A (en) * | 2019-08-01 | 2019-11-05 | 浙江华章科技有限公司 | A kind of automatic control system and its operation method of papermaking pulping section |
| CN210544944U (en) * | 2019-09-11 | 2020-05-19 | 安徽省萧县林平纸业有限公司 | Unattended closed-loop streaming system |
| WO2021249119A1 (en) * | 2020-06-11 | 2021-12-16 | 广东省金叶科技开发有限公司 | Thick pulp papermaking method-based reconstituted tobacco quantitative control system and control method, and producing system |
Non-Patent Citations (3)
| Title |
|---|
| 串级比例控制在配浆系统的应用;游少敏, 游开森, 陈道彰;中华纸业(06);全文 * |
| 造纸生产中原料自动配比的设计与实现;殷慧中;宁夏工程技术(02);全文 * |
| 高速纸机配浆控制策略;程志戈;;湖南造纸(02);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114326573A (en) | 2022-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114326573B (en) | Continuous slurry preparation method and system based on PLC system | |
| CN101329585A (en) | Control method and apparatus for coordinating flow quantity and liquid level | |
| CN104404809B (en) | Waste stuff treating apparatus | |
| CN112339128A (en) | Intelligent pulping and grouting system | |
| CN101705633A (en) | Device for controlling pulping process and control method thereof | |
| CN204151612U (en) | A kind of machine broke treating apparatus | |
| CN103734893B (en) | A kind of tobacco sheet low-concentration slurrying control system and control method | |
| CN107247470B (en) | Automatic control system for repulping and washing in potash fertilizer production | |
| CN106959606B (en) | Dynamic equalization in concentrate sorting system regulates and controls method | |
| US3572361A (en) | Apparatus for blending stock for a paper machine | |
| EP2268862B1 (en) | Feeding system comprising pumps in parallel for a continuous digester | |
| CN203715985U (en) | Medium-underflow pulping device adopting medium-underflow pump to charge | |
| CN208748424U (en) | A kind of papermaking beating process control system | |
| WO2017148191A1 (en) | Method for controlling addition of starch to gypsum boards and system thereof | |
| CN209292771U (en) | A kind of centrifugal concentration pulp distributor | |
| EP0876533A1 (en) | Apparatus and process for feeding stock to a papermachine | |
| CN215311524U (en) | Control device for quickly adjusting concentration of starch glue solution | |
| CN220194241U (en) | Pressure filter doublestage pan feeding adulterated thick concentration control system | |
| CN206721217U (en) | A kind of size mixing device in Citric Acid Production technique | |
| CN207739065U (en) | Pulp density regulating system | |
| CN206538623U (en) | Stock tank online concentration control apparatus and streaming equipment before copying | |
| CN106758472B (en) | Stock tank online concentration control apparatus and streaming equipment before copying | |
| CN202030982U (en) | Headbox dilution water adjusting device | |
| CN215592948U (en) | Lime preparation and addition system | |
| CN113287776B (en) | Pulping concentration control system for paper-making reconstituted tobacco |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |