CN-122022184-A - Method and system for determining total nitrogen emission limit value based on multi-source data

CN122022184ACN 122022184 ACN122022184 ACN 122022184ACN-122022184-A

Abstract

The invention discloses a total nitrogen emission limit value determining method and system based on multi-source data, and relates to the technical field of data analysis. Firstly, multi-source historical deviation data of a target emission source are collected, deviation analysis is conducted on the multi-source historical deviation data to obtain historical deviation characterization index values of the target emission source, then operation data of the target emission source are obtained, operation data are subjected to working condition association processing to obtain working condition stability evaluation values of the target emission source, deviation risk analysis is conducted on the basis of the historical deviation characterization index values and the working condition stability evaluation values to obtain deviation amplification risk evaluation results of the target emission source, finally, verification correction processing is conducted on initial total nitrogen emission limit values according to the deviation amplification risk evaluation results to obtain corrected total nitrogen emission limit values of the target emission source, the corrected total nitrogen emission limit values are issued to an emission regulation unit to conduct emission configuration, and accuracy and reliability of emission control can be improved while safe operation of an emission control system is guaranteed.

Inventors

PENG JIAYU
JIANG JINGQIU
WANG XINYAN
LEI KUN

Assignees

中国环境科学研究院

Dates

Publication Date: 20260512
Application Date: 20260211

Claims (10)

1. A method for determining a total nitrogen emission limit based on multi-source data, comprising: Collecting multi-source historical deviation data of a target emission source, and performing offset analysis on the multi-source historical deviation data to obtain a historical deviation representation index value of the target emission source; acquiring operation data of a target emission source, and performing working condition association processing on the operation data to obtain a working condition stability evaluation value of the target emission source; performing deviation risk analysis by combining the working condition stability assessment value based on the historical deviation characterization index value of the target emission source to obtain a deviation amplification risk assessment result of the target emission source; according to the deviation amplification risk assessment result of the target emission source, performing verification and correction processing on the initial total nitrogen emission limit value of the target emission source to obtain a corrected total nitrogen emission limit value of the target emission source; and transmitting the corrected total nitrogen emission limit value of the target emission source to an emission regulation unit for emission configuration.
2. The method for determining a total nitrogen emission limit based on multi-source data according to claim 1, wherein the method for performing offset analysis on the multi-source historical deviation data comprises: the multi-source historical deviation data of the target emission source comprise acquisition equipment drift coefficients, data transmission deviation coefficients and process operation data deviation coefficients of the target emission source; Performing offset analysis on the multi-source historical deviation data to obtain a historical deviation representation index value of the target emission source, wherein the historical deviation representation index value of the target emission source is used for representing a quantization result of the multi-source historical deviation data on the offset degree of the historical data.
3. The total nitrogen emissions limit determination method based on multi-source data of claim 1 wherein the operational data of the target emissions source comprises an emissions flow, an emissions concentration, a process temperature coefficient, a fluid flow rate, and a process pressure coefficient of the target emissions source.
4. The method for determining the total nitrogen emission limit value based on multi-source data according to claim 3, wherein the method for performing working condition association processing on the operation data is as follows: and carrying out working condition association processing on the operation data to obtain a working condition stability evaluation value of the target emission source, wherein the working condition stability evaluation value of the target emission source is used for representing a quantization result of the operation data on the working condition stability.
5. The method for determining total nitrogen emission limit value based on multi-source data according to claim 1, wherein the method for obtaining the deviation amplified risk assessment result of the target emission source is as follows: And carrying out deviation risk analysis by combining the working condition stability evaluation value based on the historical deviation characterization index value of the target emission source to obtain a deviation amplification risk evaluation value of the target emission source, wherein the deviation amplification risk evaluation value of the target emission source is used for characterizing the quantization result of the amplification effect of the accumulated deviation in the historical data under the current working condition.
6. The method for determining total nitrogen emission limit value based on multi-source data according to claim 5, wherein the method for obtaining the deviation amplified risk assessment result of the target emission source comprises the following steps: the deviation amplification risk assessment result of the target emission source comprises a limit value determination abnormality and a limit value determination normal; Comparing the deviation amplification risk assessment value of the target emission source with a preset deviation amplification risk assessment threshold, marking the deviation amplification risk assessment result of the target emission source as a limit value determination abnormality if the deviation amplification risk assessment value of the target emission source is higher than the preset deviation amplification risk assessment threshold, and marking the deviation amplification risk assessment result of the target emission source as a limit value determination normality if the deviation amplification risk assessment value of the target emission source is lower than or equal to the preset deviation amplification risk assessment threshold.
7. The method for determining a total nitrogen emission limit based on multi-source data according to claim 1, wherein the method for performing a verification correction process on an initial total nitrogen emission limit of a target emission source comprises: Extracting a deviation amplification risk assessment result of the target emission source, if the deviation amplification risk assessment result of the target emission source is that the limit value is determined to be normal, performing basic verification on an initial total nitrogen emission limit value, comparing the initial total nitrogen emission limit value of the target emission source with a preset emission regulation absolute upper limit value, and if the initial total nitrogen emission limit value of the target emission source is lower than or equal to the preset emission regulation absolute upper limit value, directly marking the initial total nitrogen emission limit value as a corrected total nitrogen emission limit value of the target emission source; if the initial total nitrogen emission limit value of the target emission source is higher than the preset emission regulation absolute upper limit value, performing overrun correction on the initial total nitrogen emission limit value of the target emission source to obtain a corrected total nitrogen emission limit value of the target emission source; if the deviation amplification risk assessment result of the target emission source is that the limit value is determined to be abnormal, the initial total nitrogen emission limit value of the target emission source is subjected to abnormal correction, and the corrected total nitrogen emission limit value of the target emission source is obtained.
8. The method for determining total nitrogen emission limit based on multi-source data as recited in claim 7, wherein said method for performing anomaly correction on initial total nitrogen emission limit of target emission source is: Recording the difference value between the deviation amplification risk assessment value of the target emission source and a preset deviation amplification risk assessment threshold value as a deviation amplification risk comparison value of the target emission source; Obtaining a deviation amplification influence factor of the target emission source by matching according to the deviation amplification risk comparison value of the target emission source; And (3) recording the product of the initial total nitrogen emission limit value of the target emission source and the deviation amplification influence factor of the target emission source as the corrected total nitrogen emission limit value of the target emission source.
9. The total nitrogen emission limit determination system based on multi-source data as recited in claim 8, wherein the method for matching the deviation amplification factor of the target emission source is: And matching the deviation amplification risk comparison value of the target emission source with the deviation amplification influence factors corresponding to the intervals of the deviation amplification risk comparison values stored in the emission limit database, and counting the deviation amplification influence factors corresponding to the intervals where the deviation amplification risk comparison values are located, and marking the deviation amplification influence factors as the deviation amplification influence factors of the target emission source.
10. A total nitrogen emission limit determination system based on multi-source data, comprising: The deviation analysis module is used for collecting multi-source historical deviation data of the target emission source, and performing deviation analysis on the multi-source historical deviation data to obtain a historical deviation representation index value of the target emission source; the stability evaluation module is used for acquiring the operation data of the target emission source, and carrying out working condition association processing on the operation data to obtain a working condition stability evaluation value of the target emission source; The risk assessment module is used for carrying out deviation risk analysis based on the historical deviation representation index value of the target emission source and combining the working condition stability assessment value to obtain a deviation amplification risk assessment result of the target emission source; The verification and correction module is used for amplifying a risk assessment result according to the deviation of the target emission source, performing verification and correction processing on the initial total nitrogen emission limit value of the target emission source, and obtaining a corrected total nitrogen emission limit value of the target emission source; and the emission configuration module is used for sending the corrected total nitrogen emission limit value of the target emission source to the emission regulation unit for emission configuration.

Description

Method and system for determining total nitrogen emission limit value based on multi-source data Technical Field The invention relates to the technical field of data analysis, in particular to a method and a system for determining total nitrogen emission limit value based on multi-source data. Background Along with the increasing serious environmental pollution problem, especially the continuous aggravation of nitrogen emission in water pollution, the accurate and effective control of total nitrogen emission has become a key problem to be solved in the modern environmental protection industry. Conventional total nitrogen emission control methods generally rely on single or static data inputs such as emission flow, emission concentration, etc., which, while being capable of substantially controlling emissions under conventional conditions, are clearly inadequate in consideration of factors such as dynamic changes in complex conditions, equipment performance degradation, instability in data transmission, and external environmental changes, resulting in significant limitations in coping with emergency situations. Particularly, under extreme conditions, small deviations which are not recognized for a long time and tiny fluctuation of the system may be superimposed and amplified, the accumulation effect causes larger errors in the calculation result of the total nitrogen emission limit, if the deviations are not corrected or repaired in time, the emission regulation system may perform regulation based on the wrong emission limit, so that serious consequences such as unstable system performance, even occurrence of abrupt rising of emission pressure, overload operation of equipment, failure or shutdown of the control system and the like occur, and in addition, as the operation time is prolonged, factors such as sensor drift, data transmission delay and the like may gradually influence the accuracy of data, so that the judgment of the system on the emission condition is increasingly blurred, and the accuracy and efficiency of the whole emission control process are affected. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a total nitrogen emission limit value determining method and a total nitrogen emission limit value determining system based on multi-source data, which can effectively solve the problems related to the background art. In order to achieve the purpose, the first aspect of the invention is realized by the following technical scheme that the total nitrogen emission limit value determining method based on multi-source data comprises the steps of collecting multi-source historical deviation data of a target emission source, and performing offset analysis on the multi-source historical deviation data to obtain a historical deviation characterization index value of the target emission source. And acquiring the operation data of the target emission source, and carrying out working condition association processing on the operation data to obtain a working condition stability evaluation value of the target emission source. And carrying out deviation risk analysis by combining the working condition stability evaluation value based on the historical deviation characterization index value of the target emission source to obtain a deviation amplification risk evaluation result of the target emission source. And amplifying a risk assessment result according to the deviation of the target emission source, and performing verification and correction processing on the initial total nitrogen emission limit value of the target emission source to obtain a corrected total nitrogen emission limit value of the target emission source. And transmitting the corrected total nitrogen emission limit value of the target emission source to an emission regulation unit for emission configuration. Further, the method for carrying out offset analysis on the multi-source historical deviation data comprises the step that the multi-source historical deviation data of the target emission source comprises a drift coefficient of acquisition equipment of the target emission source, a data transmission deviation coefficient and a process operation data deviation coefficient. Performing offset analysis on the multi-source historical deviation data to obtain a historical deviation representation index value of the target emission source, wherein the historical deviation representation index value of the target emission source is used for representing a quantization result of the multi-source historical deviation data on the offset degree of the historical data. Further, the operational data of the target emissions source includes an emissions flow, an emissions concentration, a process temperature coefficient, a fluid flow rate, and a process pressure coefficient of the target emissions source. Further, the method for carrying out the working condition association processing on the operation data comprises