CN-121975047-A - Intelligent regulation and control method and system for optical radiation pretreatment in polyacrylamide preparation

CN121975047ACN 121975047 ACN121975047 ACN 121975047ACN-121975047-A

Abstract

The invention discloses an intelligent regulation and control method and system for optical radiation pretreatment in polyacrylamide preparation, and belongs to the technical field of high polymer chemical engineering and process control. The method comprises the steps of carrying out optical radiation pretreatment on an aqueous solution of a monomer raw material, wherein the optical radiation pretreatment is adjustable in spectrum, strength and time, monitoring key indexes such as viscosity, free radical concentration, absorbance of characteristic functional groups, temperature and the like of the solution on line, comparing the monitored indexes with pre-stored targets in real time, dynamically adjusting optical radiation parameters through an intelligent regulation algorithm to enable the indexes to approach the targets, and finally conveying and polymerizing the standard pretreatment liquid. The invention realizes accurate and self-adaptive regulation and control of the pretreatment process by constructing the closed-loop control system with on-line monitoring and intelligent feedback, effectively overcomes the defects of unstable effect and dependence on artificial experience of the fixed parameter pretreatment method, and improves the consistency of the performance of the polyacrylamide product and the intelligent production level.

Inventors

YU MENG
YU RONGHE
ZHANG CHUANJIN

Assignees

河南辰龙实业有限公司

Dates

Publication Date: 20260505
Application Date: 20260205

Claims (10)

1. An intelligent regulation and control method for optical radiation pretreatment in polyacrylamide preparation is characterized by comprising the following steps: s10, carrying out optical radiation pretreatment with adjustable parameters on a monomer raw material aqueous solution for preparing polyacrylamide; S20, in the light radiation pretreatment process or after the light radiation pretreatment process is finished, on-line monitoring is carried out to obtain pretreatment indexes of the monomer raw material aqueous solution, wherein the pretreatment indexes comprise one or more of solution viscosity, free radical concentration, characteristic functional group absorbance and solution temperature; s30, comparing the pretreatment index obtained by on-line monitoring with a pre-stored target value or target interval in real time, and dynamically adjusting at least one adjustable parameter of the optical radiation pretreatment through an intelligent regulation algorithm according to the comparison result so as to enable the pretreatment index to approach or reach the target value or target interval; And S40, conveying the monomer raw material aqueous solution which reaches a target value or a target interval and is subjected to optical radiation pretreatment to a polymerization reaction unit for polymerization reaction.
2. The method according to claim 1, wherein in step S10, the optical radiation pretreatment is performed in a pretreatment reactor, wherein a programmable light source array is provided in the pretreatment reactor, and the programmable light source array comprises a plurality of light source units and an array controller; The array controller is used for receiving control instructions from an intelligent regulation algorithm and realizing continuous and dynamic regulation of the radiation spectrum wave band, the radiation intensity and the irradiation time by regulating a plurality of the on state or the off state, the driving current, the duty ratio and the total irradiation time of the light source units.
3. The method according to claim 2, wherein step S20 specifically comprises: The at least one pretreatment index is obtained through an on-line monitoring unit integrated on the pretreatment reactor or communicated with a circulating pipeline of the pretreatment reactor; the on-line monitoring unit is used for transmitting real-time monitoring data corresponding to the measuring module contained in the on-line monitoring unit to the central controller where the intelligent regulation algorithm is located for processing and comparison.
4. A method according to claim 3, wherein the pretreatment reactor comprises: a reactor body which is a closed vessel having an inlet and an outlet and is used for containing and circulating the monomer raw material aqueous solution; a light source array module provided inside or outside the reactor body; At least one optical window arranged on the wall surface of the reactor body, when the light source array module is arranged outside, the optical window is used for transmitting the light radiation to the inside of the reactor body; An on-line monitoring interface provided on the reactor body for mounting a sensing part of at least one measurement module of the on-line monitoring unit, and And the circulating pipeline interface is connected with the inlet and the outlet of the reactor body and is used for conveying the monomer raw material aqueous solution between the pretreatment reactor and an external circulating pipeline.
5. A method according to claim 3, wherein step S30 specifically comprises: S31, receiving and processing the data stream from the online monitoring unit in real time, and converting the measured value of the pretreatment index into a standardized digital signal; S32, comparing the current index value represented by the standardized digital signal with a target value or a target interval pre-stored in a database in real time, and calculating the deviation between the current index value and the boundary of the target value or the target interval; S33, according to the deviation amount and the change situation, combining with a preset regulation and control rule, and deciding by the intelligent regulation and control algorithm to generate a regulation and control strategy; S34, converting the regulation strategy into a specific control instruction of an executive component corresponding to the adjustable parameter, and transmitting the specific control instruction to the executive component; and S35, after the adjustment is executed, returning to the step S31, and restarting the comparison and regulation cycle based on the new monitoring data to form closed-loop feedback control until the pretreatment index enters and is stabilized in the target interval.
6. The method according to claim 5, wherein in step S33, the intelligent regulation algorithm specifically includes: When a fuzzy control algorithm is adopted, the deviation and the change situation are used as fuzzy input variables, reasoning is carried out according to a preset fuzzy rule base, and the regulation strategy is output after the fuzzy is solved; When a model predictive control algorithm is adopted, based on an embedded predictive model describing the dynamics of the optical radiation pretreatment process, the deviation is minimized as an optimization target, an adjustable parameter sequence in a plurality of control periods in the future is calculated through rolling optimization, and the parameter value of the first control period is used as the output of the regulation strategy.
7. The method according to claim 1, wherein step S40 specifically comprises: S41, when the duration time of the pretreatment index continuously and stably positioned in the target interval reaches a preset threshold value and is confirmed by the intelligent regulation algorithm, a conveying instruction is generated; S42, responding to the conveying instruction, conveying the monomer raw material aqueous solution subjected to the optical radiation pretreatment to a polymerization reaction unit; s43, when the conveying is started, a pretreatment completion signal is sent to a controller of the polymerization reaction unit.
8. An intelligent regulation and control system for optical radiation pretreatment in polyacrylamide preparation, for implementing the method of any one of claims 1 to 7, characterized in that the system comprises: The pretreatment module is used for carrying out optical radiation pretreatment with adjustable parameters on the aqueous solution of the monomer raw materials for preparing the polyacrylamide; The monitoring module is used for monitoring pretreatment indexes of the monomer raw material aqueous solution on line in the process of or after the light radiation pretreatment, wherein the pretreatment indexes comprise one or more of solution viscosity, free radical concentration, characteristic functional group absorbance and solution temperature; The regulation and control module is used for comparing the pretreatment index obtained by the on-line monitoring with a pre-stored target value or target interval in real time, and dynamically regulating at least one adjustable parameter of the optical radiation pretreatment through an intelligent regulation and control algorithm according to the comparison result so as to enable the pretreatment index to approach or reach the target value or target interval; And the conveying module is used for conveying the monomer raw material aqueous solution which reaches a target value or a target interval and is subjected to optical radiation pretreatment to the polymerization reaction unit for polymerization reaction.
9. An electronic device, comprising: One or more processors; storage means for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the intelligent regulation method for optical radiation pretreatment in the preparation of polyacrylamide according to any one of claims 1 to 7.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the program, when executed by a processor, implements an intelligent regulation method for optical radiation pretreatment in the preparation of polyacrylamide according to any one of claims 1 to 7.

Description

Intelligent regulation and control method and system for optical radiation pretreatment in polyacrylamide preparation Technical Field The invention belongs to the technical field of high molecular chemical industry and process automation control, in particular relates to a pretreatment process optimization method and system in the polyacrylamide preparation process, and particularly relates to a dynamic regulation and control method and system for optical radiation pretreatment of an aqueous solution of a polyacrylamide monomer raw material based on-line monitoring and intelligent feedback. Background As an important water-soluble high-molecular polymer, polyacrylamide is widely applied to the fields of petroleum exploitation, water treatment, papermaking, mining and metallurgy, textile and the like, and the product performance (such as molecular weight, molecular weight distribution, solubility and flocculation efficiency) directly depends on the efficiency and controllability of polymerization reaction. In various preparation methods of polyacrylamide, the pretreatment of light radiation is carried out on aqueous solutions of monomer raw materials such as acrylamide and the like, and the method is an important pre-polymerization activation means. The process initiates active free radicals with controllable concentration in the monomer solution or changes the state of a solution system through light radiation of a specific wave band, can effectively shorten the induction period of the subsequent polymerization reaction, optimize the initiation efficiency, and further has positive influence on the molecular structure and the performance of a final product. Therefore, the stability and the accuracy of the optical radiation pretreatment process are one of key links for improving the quality consistency and the production efficiency of the polyacrylamide product. At present, the conventional technology for carrying out optical radiation pretreatment on the polyacrylamide monomer solution in industrial production and scientific research mainly adopts fixed or semi-fixed technological parameters. Specifically, the operator typically empirically sets a fixed illumination band, intensity, and treatment duration to irradiate the monomer solution. In some more advanced control schemes, the pretreatment process is terminated manually or semi-automatically based on the initial temperature of the solution or a simple feedback signal (e.g., reaching a predetermined time). The core of the prior art solution is that its pretreatment parameters (spectrum, intensity, time) are preset, static or adjusted only in limited dimensions, and its control logic is essentially open-loop, i.e. executed according to a preset program, without on-line monitoring and dynamic response of real-time, critical physicochemical changes occurring inside the solution during pretreatment. However, the inventors have discovered that the aforementioned prior art has significant limitations and problems in carrying out the present invention. First, the stability of the pretreatment effect is difficult to ensure. Due to factors such as batch difference of monomer raw materials, performance attenuation of a light source, fluctuation of ambient temperature and the like, fixed pretreatment parameters cannot ensure that pretreatment solutions with the same quality can be obtained each time, so that subsequent polymerization reaction fluctuation is caused, and the performances of final products are different. Secondly, the process control depends on experience, and lacks of accuracy and scientificity. The current open-loop control mode can not sense key indexes such as solution viscosity, real concentration of free radicals, change of characteristic functional groups and the like in the pretreatment process and directly reflect the pretreatment effect, so that parameter adjustment is lagged and blind. Again, adaptive optimization cannot be achieved. When production conditions or specifications of target products change, the prior art is difficult to quickly and accurately find the optimal pretreatment parameter combination, repeated trial-and-error manual adjustment is needed, and the efficiency is low and the cost is high. Therefore, a closed-loop control method capable of sensing pretreatment state on line and intelligently and dynamically regulating and controlling optical radiation parameters according to the pretreatment state is developed, and urgent practical requirements are met for realizing high-quality, high-efficiency and repeatable industrial production of polyacrylamide. Disclosure of Invention In view of the above, the embodiments of the present invention provide an intelligent control method and system for optical radiation pretreatment in polyacrylamide preparation, so as to solve at least one of the above technical problems. In order to achieve the above object, in a first aspect, there is provided an intelligent control method for optica