CN-121785279-B - Method for real-time monitoring and controlling resin regeneration process

CN121785279BCN 121785279 BCN121785279 BCN 121785279BCN-121785279-B

Abstract

The invention relates to the technical field of process control, in particular to a method for monitoring and controlling a resin regeneration process in real time, which comprises the following steps: and acquiring a liquid level period and a pump valve state to judge a regeneration condition, generating a control signal by the joint control parameter, switching the flow according to multiple indexes, monitoring the homogeneity of the mixed bed, and forming a regeneration monitoring record by the collected data. According to the invention, by introducing a real-time liquid level judgment condition and regeneration period logic joint control mechanism, accurate judgment and interrupt signal feedback of a process start pre-condition are realized, state mapping and control coordination among multiple devices in a regeneration process are established through dynamic identification analysis of operation parameters and an adjustment range, closed loop response capability of process control is improved, false triggering risks are effectively avoided through multi-index identification logic of switching conditions, quantitative evaluation of mixing homogeneity is realized through comprehensive analysis of liquid level disturbance and flow velocity change, the mixing efficiency of the regenerated liquid and resin utilization effect are improved, and the stability and safety of the regeneration process are ensured.

Inventors

LIU MINGJUN
LIU HONGYOU
ZHU QIUSHI
LI WANXU
LI RUIXUE
ZHANG JINYU
WANG RUI
Miao Yilu
WANG XIAO
WANG LEI
LIU ZHU
WANG JUNQIAO
JIAO LONG
Xing Wantao
MA HONGCHEN
Lv jinke
LI WEIGANG
JIA XIUMING
JIANG JIHANG
LI QIANG
LI YANG
FAN CHENGYAO

Assignees

华能营口热电有限责任公司

Dates

Publication Date: 20260505
Application Date: 20260305

Claims (9)

1. The method for monitoring and controlling the resin regeneration process in real time is characterized by comprising the following steps: S1, acquiring liquid level sensor signals, the last regeneration interval time and the current pump valve running state of a positive bed, a negative bed and mixed bed equipment, identifying whether regeneration pre-conditions are met, judging whether a water pump and a pneumatic valve are all in an automatic running mode, and generating an equipment initial joint control identification set; s2, based on the initial joint control identification set of the equipment, reading current operation parameters of a flow control pump group, an acid-base metering valve group and a liquid level valve group of the positive bed, the negative bed and the mixed bed equipment in the backwashing and regeneration stage, identifying whether parameters exceeding a range exist or not, and generating a regeneration stage control signal map; S3, extracting a positive bed backwashing, regenerating, replacing and forward washing stage flow switching signal according to the regeneration stage control signal map, judging whether switching conditions are met, marking an abnormal state, recording the current stage number and generating a stage switching trigger logic sequence; S4, synchronously analyzing a stirring pump start-stop signal of the mixed bed equipment, an instantaneous opening change of an air inlet valve and a resin layer liquid level fluctuation record by combining the phase switching trigger logic sequence, judging whether the current mixing process reaches a preset standard, and generating a mixed bed stirring process monitoring result; And S5, collecting all the collected, controlled and fed-back data based on the monitoring result of the mixed bed stirring process, updating the unique serial number label of the current batch task, and sealing and storing the data record to generate a real-time monitoring control record of the resin regeneration process.
2. The method for real-time monitoring and controlling a resin regeneration process according to claim 1, wherein the pre-regeneration conditions specifically refer to that the positive bed and the negative bed reach the upper limit of the regeneration triggering liquid level of 1000 mm, the mixed bed satisfies the liquid level higher than 70% of the total height of the equipment, the regeneration wastewater pool is in a set low liquid level safety range, and the last regeneration interval time is longer than the preset minimum regeneration period for 8 hours based on liquid level data.
3. The method for real-time monitoring and controlling a resin regeneration process according to claim 1, wherein the switching condition is that the drainage turbidity is stably lower than a set threshold value at the end of backwashing, the acid-base flow rate maintaining continuity time in the regeneration stage exceeds a set operation duration, the flow rate fluctuation in the replacement stage is smaller than a preset flow rate fluctuation allowable threshold value, and the water quality monitoring signal of the effluent in the forward washing stage is continuously sampled five times to meet the index requirement.
4. The method for real-time monitoring and controlling a resin regeneration process according to claim 1, wherein the initial joint control identification set of the equipment comprises a liquid level threshold abnormal type, an operation state abnormal identification, a regeneration period discrimination state and a control mode state set, the regeneration section control signal map comprises a parameter overrun type, equipment control state matching information and a control object mapping relation, the phase switching trigger logic sequence comprises a switching condition meeting identification, a current flow phase index and a phase abnormal record mark, the mixed bed stirring process monitoring result comprises a liquid level disturbance amplitude analysis result, a circulation flow rate periodic analysis result and a mixed homogeneity assessment state, and the resin regeneration process real-time monitoring control record comprises a task unique number label, an abnormal data identification and an execution process data collection record.
5. The method for real-time monitoring and controlling a resin regeneration process according to claim 1, wherein the step of obtaining the initial set of joint control identifiers of the equipment is: s111, acquiring real-time data of a positive bed, a negative bed and a mixed bed liquid level sensor and liquid level sensor data of a regeneration wastewater pond, judging whether the positive bed and the negative bed reach the upper limit of a regeneration triggering liquid level of 1000 mm, judging whether the mixed bed liquid level meets the condition that the liquid level is higher than 70% of the total height of equipment, judging whether the regeneration wastewater pond is in a set low liquid level safety range, and generating a liquid level standard reaching state set; S112, based on the liquid level standard reaching state set, collecting the last regeneration interval time recorded by the PLC, judging whether the last regeneration interval time is larger than the 8-hour standard value of the minimum regeneration period, and if all the liquid level states and the time conditions are standard reaching states, recording the regeneration pre-condition as a meeting state, and generating a regeneration condition meeting marking item set; S113, collecting current start-stop state signals of the water pump and the pneumatic valve according to the regeneration condition meeting the marking item set, and confirming whether all the water pump and the pneumatic valve are in an automatic operation state or not to obtain an equipment initial joint control identification set.
6. The method for real-time monitoring and controlling a resin regeneration process according to claim 1, wherein the regeneration section control signal map acquisition step comprises: S211, based on the equipment initial joint control identification set, collecting flow control pump set operation parameters, acid-base metering valve set operation parameters and liquid level valve set operation parameters corresponding to the positive bed, negative bed and mixed bed equipment in the backwashing and regeneration stage, integrating start-stop set point parameters of each equipment, and establishing an equipment operation parameter combination sequence; S212, reading a preset valve opening adjustment curve and a regeneration liquid dilution ratio adjustment range according to the equipment operation parameter combination sequence, comparing a valve opening real-time value with position data corresponding to the preset valve opening adjustment curve, executing boundary judgment on the dilution ratio real-time value and the preset regeneration liquid dilution ratio adjustment range, indexing and marking out-of-range parameter positions, and generating an out-of-range parameter index set; s213, for the out-of-range parameter index set, corresponding equipment numbers, parameter types and operation stage identification information are read, mapping and aggregation are carried out on the normal parameter state and the out-of-range parameter state according to time sequence, and a regeneration section control signal map is established.
7. The method for real-time monitoring and controlling a resin regeneration process according to claim 1, wherein the step of obtaining the phase switching trigger logic sequence comprises the steps of: S311, extracting flow switching signals of a positive bed in four stages of backwashing, regenerating, replacing and forward washing according to the regeneration section control signal map, splitting the signals according to a stage sequence, carrying out structural aggregation on flow signal identifiers and time stamps of each stage, and establishing a switching event sequence according to stage numbers to generate a stage switching signal frame set; s312, based on the stage switching signal frame set, collecting drainage turbidity, acid-base flow, water quality of effluent and main pump flow monitoring signals, comparing drainage turbidity in a backwash stage with a set turbidity threshold, comparing duration time of acid-base flow in a regeneration stage with a set operation duration threshold, comparing a fluctuation value of flow in a replacement stage with a flow stability amplitude reference value, and comparing five continuous samples of water quality signals in a forward washing stage with a quality index set to obtain a switching condition judgment result set; and S313, carrying out logic summarization on the judging results of each stage according to the judging result set of the switching conditions, recording the state as switching permission if all the marks are satisfied, recording the number of the current stage and adding an abnormal flag bit if any one of the marks is not satisfied, and establishing a stage switching trigger logic sequence.
8. The method for real-time monitoring and controlling a resin regeneration process according to claim 1, wherein the step of obtaining the monitoring result of the mixed bed stirring process is as follows: S411, acquiring a mixing bed equipment stirring pump start-stop signal, intake valve instantaneous opening change data and resin layer liquid level fluctuation record by combining the phase switching trigger logic sequence, carrying out index alignment on the three signals according to a unified time reference, and carrying out synchronous processing on the stirring pump start-stop state and the intake valve change position to generate a mixing bed disturbance time period identification sequence; S412, based on the mixed bed disturbance time period identification sequence, extracting liquid level change data and circulating flow rate data in a corresponding section, executing maximum and minimum difference calculation on the liquid level fluctuation amplitude, and carrying out continuous period judgment on the circulating flow rate change period to obtain a liquid level disturbance and flow rate change matching characteristic set; s413, according to disturbance amplitude and periodic regularity of each section of data in the liquid level disturbance and flow velocity change matching feature set, section judgment is carried out on each section of numerical value and a preset judgment threshold, time sections conforming to the threshold section are recorded, the time sections are aggregated into continuous time blocks according to the stage sequence, abnormal sections and fluid states are marked, and a mixed bed stirring process monitoring result is established.
9. The method for real-time monitoring and controlling a resin regeneration process according to claim 1, wherein the step of acquiring the real-time monitoring control record of the resin regeneration process comprises the steps of: S511, based on the monitoring result of the mixed bed stirring process, carrying out unified aggregation treatment on all sampling data frames, control signal records and equipment feedback states acquired by the current batch, carrying out alignment calibration on time stamps, constructing all relevant data into a batch structured information set, and generating a task data aggregation matrix; S512, according to the task data collection matrix, searching and checking the number of the current batch, updating the unique identification code corresponding to the batch in the record, embedding the new data frame into the current batch number field, and executing the full replacement operation to obtain a batch identification update record set; and S513, updating the record set according to the batch identification, carrying out marking and sealing processing on the data records which do not accord with the execution sequence and the execution condition, reserving the current batch index and the original data pointer, summarizing all the effective records and sealing identifications according to time sequence, and establishing a real-time monitoring control record of the resin regeneration process.

Description

Method for real-time monitoring and controlling resin regeneration process Technical Field The invention relates to the technical field of process control, in particular to a method for monitoring and controlling a resin regeneration process in real time. Background The technical field of process control mainly relates to monitoring and adjusting various process parameters such as temperature, pressure, flow, liquid level, chemical composition and the like in industrial production, and continuous and stable operation of a target process is realized through sensors, actuators and control, including parameter acquisition, signal transmission, control strategy execution, feedback adjustment and the like, and an open-loop or closed-loop control method is generally adopted to ensure production safety, improve product quality and reduce energy consumption. The traditional resin regeneration process real-time monitoring and controlling method is a method for monitoring and controlling links such as injection, replacement, water washing and the like of regenerated liquid in the process of recovering the exchange capacity of the ion exchange resin in a chemical regeneration mode after the ion exchange resin is used for treating water or other liquids, a timing controller is generally relied on for setting a regeneration period and operation time, the flow of each stage is controlled through preset time or manual switching, the monitoring means generally adopts fixed-point sampling to detect the conductivity or the pH value of the effluent of a resin bed to judge the regeneration degree, and a logic circuit or a programmable controller is used for controlling the opening and closing of a valve and the pumping operation. In the prior art, a flow switching node is set in a multi-dependent timing control mode in the resin regeneration process, the real-time sensing capability on equipment state and liquid level change is lacked, whether regeneration conditions are available or not is difficult to dynamically identify, the risk of delay or advance exists in regeneration operation, the operation mode depends on manual judgment and manual switching, process linkage and logic judgment support are lacked, high operation intensity and high error rate are caused, the control logic of a regeneration stage is single, the resin regeneration degree is judged only by a fixed-point detection means, the operation state of each stage cannot be comprehensively reflected, the problems of insufficient regeneration or excessive regeneration easily occur, the equipment start-stop and liquid level control cannot be accurately combined, the operation hidden troubles such as bed overpressure or resin escape are formed, unified collection and judgment of regeneration data cannot be realized, the traceability of abnormal working conditions is lacked, and further improvement of operation efficiency and safety is limited. Disclosure of Invention In order to solve the technical problems in the prior art, the embodiment of the invention provides a method for monitoring and controlling a resin regeneration process in real time, which comprises the following steps: in order to achieve the above purpose, the invention adopts the following technical scheme that the method for monitoring and controlling the resin regeneration process in real time comprises the following steps: S1, acquiring liquid level sensor signals, the last regeneration interval time and the current pump valve running state of a positive bed, a negative bed and mixed bed equipment, identifying whether regeneration pre-conditions are met, judging whether a water pump and a pneumatic valve are all in an automatic running mode, and generating an equipment initial joint control identification set; s2, based on the initial joint control identification set of the equipment, reading current operation parameters of a flow control pump group, an acid-base metering valve group and a liquid level valve group of the positive bed, the negative bed and the mixed bed equipment in the backwashing and regeneration stage, identifying whether parameters exceeding a range exist or not, and generating a regeneration stage control signal map; S3, extracting a positive bed backwashing, regenerating, replacing and forward washing stage flow switching signal according to the regeneration stage control signal map, judging whether switching conditions are met, marking an abnormal state, recording the current stage number and generating a stage switching trigger logic sequence; S4, synchronously analyzing a stirring pump start-stop signal of the mixed bed equipment, an instantaneous opening change of an air inlet valve and a resin layer liquid level fluctuation record by combining the phase switching trigger logic sequence, judging whether the current mixing process reaches a preset standard, and generating a mixed bed stirring process monitoring result; And S5, collecting all the collected, controlled and fed