CN-122018467-A - Hydrogen sulfide capturing and eliminating control method based on industrial monitoring software

CN122018467ACN 122018467 ACN122018467 ACN 122018467ACN-122018467-A

Abstract

The invention relates to the technical field of sewage treatment and industrial automation control, in particular to a hydrogen sulfide capturing and eliminating control method based on industrial monitoring software, which comprises the steps of data acquisition and pretreatment, wherein the industrial monitoring software is used for acquiring indirect state parameters and direct monitoring parameters of a sewage treatment system; inputting the indirect state parameters into a soft measurement reconstruction model to calculate and predict the concentration of hydrogen sulfide, and correcting the direct monitoring parameters to generate corrected concentration value of hydrogen sulfide; a toxicity index calculating step of calculating a toxicity inhibition index of the downstream biological processing unit based on the historical medicament addition amount and the real-time flow data; the multi-mode strategy decision step comprises the steps of selecting a strategy for generating emergency blocking, controlled overflow or critical steady state and outputting a medicament pump control command based on the corrected concentration value and toxicity inhibition index, and the invention solves the defect that the traditional control neglects medicament side effects, and realizes the system toughness operation for maintaining environment-friendly compliance and protecting bioactivity.

Inventors

LI XIA
ZHANG YUAN
LIANG YUANJIE
LI QINGLING
Qian Yinuo
GAN LIJIA
HUANG HUI

Assignees

重庆安全技术职业学院

Dates

Publication Date: 20260512
Application Date: 20260211

Claims (8)

1. The hydrogen sulfide capturing and eliminating control method based on industrial monitoring software is characterized by comprising the following steps of: the method comprises the steps of collecting indirect state parameters and direct monitoring parameters of a sewage treatment system through a data interface of industrial monitoring software; Inputting the indirect state parameter into a preset soft measurement reconstruction model, wherein the soft measurement reconstruction model is configured to represent the mapping relation between the indirect state parameter and the hydrogen sulfide concentration, calculate the predicted hydrogen sulfide concentration at the current moment, and correct the direct monitoring parameter by utilizing the predicted hydrogen sulfide concentration to generate a corrected hydrogen sulfide concentration value; Based on the historical medicament dosage data and the real-time flow data of the sewage treatment system, calculating a toxicity inhibition index of a downstream biological treatment unit; Determining a reagent addition control strategy for the sewage treatment system based on the corrected hydrogen sulfide concentration value and the toxicity inhibition index, and outputting a corresponding reagent pump control instruction; wherein the determining a reagent dosing control strategy for the wastewater treatment system comprises: generating an emergency blocking strategy in response to the corrected hydrogen sulfide concentration value being above a preset hard emission limit; And comparing the toxicity inhibition index with a preset bio-breakdown threshold in response to the corrected hydrogen sulfide concentration value being less than or equal to the hard emission limit value, generating a controlled overflow strategy in response to the toxicity inhibition index being greater than the bio-breakdown threshold, and generating a critical steady-state strategy in response to the toxicity inhibition index being less than or equal to the bio-breakdown threshold.
2. The method of claim 1, wherein said modifying said directly monitored parameter with said predicted hydrogen sulfide concentration to produce a modified hydrogen sulfide concentration value comprises: calculating the ratio of the absolute value of the difference between the direct monitoring parameter and the predicted hydrogen sulfide concentration to the predicted hydrogen sulfide concentration as a deviation ratio; determining that a sensor has poisoning drift in response to the deviation ratio exceeding a preset sensor drift threshold, and taking the predicted hydrogen sulfide concentration as the corrected hydrogen sulfide concentration value, or In response to the deviation ratio not exceeding the sensor drift threshold, a weighted average of the directly monitored parameter and the predicted hydrogen sulfide concentration is calculated as the corrected hydrogen sulfide concentration value.
3. The method of claim 1, wherein the generating a controlled spill strategy as the medicament administration control strategy comprises: setting a control target concentration to a first target value, wherein the first target value is higher than a preset daily operation target value and lower than the hard emission limit value; Calculating a first reagent dosage by using a proportional-integral-derivative control algorithm based on the first target value and the corrected hydrogen sulfide concentration value; And packaging the first medicament adding amount into the medicament pump control instruction.
4. The method of claim 1, wherein generating a critical steady-state strategy as the agent dosing control strategy comprises: Setting a control target concentration to a second target value, wherein the second target value is equal to the daily operation target value; Calculating a second reagent dosage by using a proportional-integral-derivative control algorithm based on the second target value and the corrected hydrogen sulfide concentration value; and packaging the second medicament dosage into the medicament pump control instruction.
5. The method of claim 1, wherein the indirect status parameter comprises: the pH value of the inlet water, the oxidation-reduction potential ORP value, the inlet water flow value and the inlet water pipeline pressure value.
6. The method of claim 1, wherein the calculating a toxicity inhibition index for a downstream biological treatment unit based on historical reagent dosage data and real-time flow data for the wastewater treatment system comprises: Acquiring the accumulated medicament addition amount of the historical medicament addition amount data in a preset time window; Acquiring accumulated water inflow of the real-time flow data in the preset time window; calculating the ratio of the cumulative medicament addition amount to the cumulative water inflow to obtain the current medicament residual concentration; And carrying out mapping calculation based on the current medicament residual concentration by using a preset biological activity attenuation function to obtain the toxicity inhibition index, wherein the biological activity attenuation function defines a positive correlation mapping relation between the medicament residual concentration and the toxicity inhibition index.
7. The method of claim 1, wherein the generating an emergency shutdown strategy in response to the modified hydrogen sulfide concentration value being above a preset hard emission limit comprises: starting a timer to monitor a duration that the modified hydrogen sulfide concentration value is continuously above the hard emission limit; Generating a whole plant shutdown cut-off instruction in response to the duration exceeding a preset emergency response time threshold; in response to the duration not exceeding the contingency response time threshold, a maximum load delivery command corresponding to a maximum rated flow of the medicament pump is generated.
8. The method according to claim 1, wherein the method further comprises: after executing the medicament addition control strategy, acquiring the corrected hydrogen sulfide concentration value at the next moment as feedback data; calculating a control error between the feedback data and a control target concentration; And storing the control error, the indirect state parameter and the direct monitoring parameter into a training database for periodically updating the soft measurement reconstruction model.

Description

Hydrogen sulfide capturing and eliminating control method based on industrial monitoring software Technical Field The invention relates to the technical field of sewage treatment and industrial automation control, in particular to a hydrogen sulfide capturing and eliminating control method based on industrial monitoring software. Background The control of hydrogen sulfide capture and elimination refers to adjusting the adding amount of the deodorizing agent according to the running state of the sewage treatment system so as to remove malodorous pollutants, wherein the malodorous pollutants are mainly hydrogen sulfide gas generated by organic matters in sewage under anaerobic conditions. The current hydrogen sulfide control method comprises three steps of manual feedback control based on manual sampling, fixed ratio addition control based on inflow and proportional-integral-differential automatic control based on single gas sensor feedback. However, when the medicament addition control is performed based on the prior art, a single gas sensor for direct measurement is extremely easy to generate poisoning drift or failure under severe environments, so that a feedback signal source is distorted. Traditional control logic, in particular to constant ratio dosing control based on flow and single sensor feedback control, lack quantitative evaluation of toxic and side effects of the medicament on a downstream biological treatment unit, so that biological system collapse is easily caused by excessive dosing, and the stability and safety of whole-flow operation are reduced. Disclosure of Invention In order to solve the technical problems, the invention provides a hydrogen sulfide capturing and eliminating control method based on industrial monitoring software, which concretely comprises the following steps: the method comprises the steps of collecting indirect state parameters and direct monitoring parameters of a sewage treatment system through a data interface of industrial monitoring software; Inputting the indirect state parameter into a preset soft measurement reconstruction model, wherein the soft measurement reconstruction model is configured to represent the mapping relation between the indirect state parameter and the hydrogen sulfide concentration, calculate the predicted hydrogen sulfide concentration at the current moment, and correct the direct monitoring parameter by utilizing the predicted hydrogen sulfide concentration to generate a corrected hydrogen sulfide concentration value; Based on the historical medicament dosage data and the real-time flow data of the sewage treatment system, calculating a toxicity inhibition index of a downstream biological treatment unit; Determining a reagent addition control strategy for the sewage treatment system based on the corrected hydrogen sulfide concentration value and the toxicity inhibition index, and outputting a corresponding reagent pump control instruction; wherein the determining a reagent dosing control strategy for the wastewater treatment system comprises: Generating an emergency blocking strategy as the medicament addition control strategy in response to the corrected hydrogen sulfide concentration value being higher than a preset hard emission limit value; comparing the toxicity inhibition index to a preset bio-breakdown threshold in response to the corrected hydrogen sulfide concentration value being less than or equal to the hard emission limit; Generating a controlled extravasation strategy as the agent dosing control strategy in response to the toxicity inhibition index being above the bio-collapse threshold; And in response to the toxicity inhibition index being less than or equal to the bio-collapse threshold, generating a critical steady-state strategy as the agent dosing control strategy. Preferably, the correcting the directly monitored parameter by using the predicted hydrogen sulfide concentration to generate a corrected hydrogen sulfide concentration value includes: calculating the ratio of the absolute value of the difference between the direct monitoring parameter and the predicted hydrogen sulfide concentration to the predicted hydrogen sulfide concentration as a deviation ratio; determining that a sensor has poisoning drift in response to the deviation ratio exceeding a preset sensor drift threshold, and taking the predicted hydrogen sulfide concentration as the corrected hydrogen sulfide concentration value, or In response to the deviation ratio not exceeding the sensor drift threshold, a weighted average of the directly monitored parameter and the predicted hydrogen sulfide concentration is calculated as the corrected hydrogen sulfide concentration value. Preferably, the generating a controlled overflow strategy as the medicament administration control strategy includes: setting a control target concentration to a first target value, wherein the first target value is higher than a preset daily operation target value and lower than the