CN-121994987-A - Denitration catalyst service life assessment method, device and equipment

CN121994987ACN 121994987 ACN121994987 ACN 121994987ACN-121994987-A

Abstract

The embodiment of the disclosure provides a denitration catalyst life evaluation method, a denitration catalyst life evaluation device and denitration catalyst life evaluation equipment. The method comprises the steps of obtaining current operation parameters of a denitration system, correcting the flow of flue gas entering the denitration system according to the current operation parameters of the denitration system to obtain corrected flow of flue gas, calculating the surface speed of a denitration catalyst of the denitration system according to the corrected flow of flue gas, calculating the dynamic decay time of the denitration catalyst in unit time according to the surface speed, and evaluating the service life of the denitration catalyst according to the dynamic decay time in unit time. In this way, the life of the denitration catalyst can be efficiently, quickly and accurately estimated by utilizing the current operation parameters of the denitration system, and the need of estimating the life of the denitration catalyst according to human experience is avoided.

Inventors

WANG XIN
TANG YIN
MA ZHUO
XIAO YUTING
WANG PEI
LU JINFENG
JIANG FENG
XING YANG

Assignees

国能无锡环保科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260106

Claims (10)

1. A denitration catalyst lifetime assessment method, characterized by comprising: Acquiring current operation parameters of a denitration system; Correcting the flow of the flue gas entering the denitration system according to the current operation parameters of the denitration system to obtain corrected flow of the flue gas; Calculating the surface speed of a denitration catalyst of the denitration system according to the corrected flue gas flow; calculating the dynamic decay time of the denitration catalyst in unit time according to the surface speed; And evaluating the service life of the denitration catalyst according to the dynamic decay time in the unit time.
2. The method of claim 1, wherein, And evaluating the service life of the denitration catalyst according to the dynamic decay time in the unit time, wherein the method comprises the following steps of: Calculating denitration efficiency of the denitration system under different working conditions and at different running times; Calculating theoretical activity values under different working conditions according to the denitration efficiency of the denitration system under different working conditions and different running times; calculating theoretical decay time under different working conditions according to the theoretical activity values under different working conditions; and evaluating the service life of the denitration catalyst according to the dynamic decay time in the unit time and the theoretical decay time under different working conditions.
3. The method of claim 2, wherein, The calculating the denitration efficiency of the denitration system under different working conditions and in different running time comprises the following steps: acquiring the operation load and the operation temperature of the denitration system in different operation time under different working conditions; acquiring a preset theoretical denitration efficiency formula; According to the preset theoretical denitration efficiency formula and the operation loads and the operation temperatures of the denitration system under different working conditions and at different operation times, calculating the denitration efficiency of the denitration system under different working conditions and at different operation times; According to the denitration efficiency of the denitration system under different working conditions and different running time, calculating theoretical activity values under different working conditions comprises the following steps: and calculating theoretical activity values under different working conditions according to the denitration efficiency, the ammonia escape preset value, the nitrogen oxide concentration at the inlet of the denitration system and the surface speed of the denitration catalyst of the denitration system under different working conditions in different running times.
4. The method of claim 3, wherein, The preset theoretical denitration efficiency formula comprises: the theoretical denitration efficiency after the operation time t under different working conditions is shown, And Respectively representing the operation load and the operation temperature of different working conditions, Represents theoretical denitration efficiency, T B represents flue gas temperature under BMCR working condition, The operation load under BMCR working conditions is represented, alpha, beta and gamma respectively represent the correction coefficient of the operation load, the correction coefficient of the operation temperature and the correction coefficient of the operation time, and t is time.
5. The method of claim 2, wherein, Calculating the theoretical decay time under different working conditions according to the theoretical activity values under different working conditions, wherein the theoretical decay time comprises the following steps: obtaining the design service life and the index stable operation time of the denitration catalyst; obtaining theoretical activity values of the denitration catalyst in different working conditions when the denitration catalyst has a designed service life and theoretical activity values of the denitration catalyst in index stable operation time; calculating the theoretical attenuation rate of the denitration catalyst under different working conditions according to the theoretical activity value of the denitration catalyst under different working conditions when the service life is designed and the theoretical activity value of the denitration catalyst when the index is stable in operation time; determining an attenuation rate weight coefficient according to the theoretical attenuation rate of the denitration catalyst under the full-load working condition; and calculating theoretical decay time of the denitration catalyst under different working conditions according to the theoretical decay rate of the denitration catalyst under different working conditions and the decay rate weight coefficient.
6. The method of claim 1, wherein, Correcting the flow of the flue gas entering the denitration system according to the current operation parameters of the denitration system to obtain corrected flow of the flue gas, wherein the method comprises the following steps: calling a preset flue gas flow conversion formula; Calculating the converted inlet flue gas flow of the denitration system according to the current operation parameters of the denitration system and the preset flue gas flow conversion formula; calling a preset flue gas flow correction formula; Obtaining corrected smoke flow according to the converted smoke flow of the inlet of the denitration system, the reading of the smoke flow of the inlet of the denitration system and the correction formula of the preset smoke flow, wherein the conversion formula of the preset smoke flow is as follows: indicating the ith data acquisition time, according to the inlet flue gas flow after the operation condition conversion, 、、 Respectively representing the inlet flue gas temperature reading of the denitration system, the inlet flue gas pressure reading of the denitration system and the inlet operation load reading of the denitration system at the ith data acquisition time, 、、、 And respectively representing the inlet flue gas temperature, the flue gas pressure, the operation load and the flue gas flow reading of the denitration system at the ith data acquisition time under BMCR working conditions.
7. The method of claim 6, wherein the preset flue gas flow correction formula comprises: Wherein, the Represents the corrected smoke flow (i.e. corrected smoke flow) at the ith data acquisition time, And (3) indicating the inlet flue gas flow reading of the denitration system at the ith data acquisition time, wherein epsilon indicates a correction coefficient, and the calculation mode is as follows: Wherein ε 1 represents a deviation factor, ε 2 represents a timing factor, ε 3 represents a working condition factor: Wherein Qread (i) represents the inlet flue gas flow reading of the denitration system at the ith data acquisition time, and Qread (max) and Qread (min) represent the maximum value and the minimum value of the inlet flue gas flow reading of the denitration system at the n data acquisition times respectively.
8. The method according to any one of claim 1 to 7, Calculating the dynamic decay time of the denitration catalyst in unit time according to the surface speed, wherein the dynamic decay time comprises the following steps: acquiring a nitrogen oxide concentration reading at an inlet of the denitration system and a nitrogen oxide concentration reading at an outlet of the denitration system; calculating the real-time denitration efficiency of the denitration system according to the nitrogen oxide concentration reading at the inlet of the denitration system and the nitrogen oxide concentration reading at the outlet of the denitration system; Acquiring an ammonia escape preset value of the denitration system; According to the ammonia escape preset value of the denitration system and the real-time denitration efficiency of the denitration system, calculating the ammonia nitrogen molar ratio of the denitration system; Calculating the current real-time activity of the denitration catalyst according to the ammonia nitrogen molar ratio of the denitration system, the real-time denitration efficiency of the denitration system and the surface speed; acquiring the current theoretical activity of the denitration system; and calculating the dynamic decay time of the denitration catalyst in unit time according to the current real-time activity of the denitration catalyst and the current theoretical activity of the denitration system.
9. A denitration catalyst lifetime assessment device characterized by comprising: The acquisition module is used for acquiring the current operation parameters of the denitration system; The correction module is used for correcting the flow of the flue gas entering the denitration system according to the current operation parameters of the denitration system to obtain corrected flow of the flue gas; the first calculation module is used for calculating the surface speed of the denitration catalyst of the denitration system according to the corrected flue gas flow; the second calculation module is used for calculating the dynamic decay time of the denitration catalyst in unit time according to the surface speed; and the evaluation module is used for evaluating the service life of the denitration catalyst according to the dynamic decay time in the unit time.
10. An electronic device, comprising: A memory and a processor, wherein the memory is configured to store, The memory having stored thereon a computer program which when executed by the processor implements the method of any of claims 1-8.

Description

Denitration catalyst service life assessment method, device and equipment Technical Field The disclosure relates to the field of denitration catalysts, in particular to the technical field of denitration catalyst life assessment. Background At present, the method for evaluating the residual effective life of the denitration catalyst mainly comprises the steps of sampling and detecting, namely waiting for a shutdown window period of a denitration system, extracting the denitration catalyst from a denitration reactor through hoisting equipment, sending the denitration catalyst to a professional detection mechanism for activity evaluation, and pushing the result back to a user after the laboratory activity evaluation is completed. Aiming at the residual effective life assessment method of the denitration catalyst, the combined means of entity sampling, laboratory accurate detection and data modeling has the defects that firstly, the method lacks timeliness, namely, a user cannot know the residual effective life of the catalyst in real time, particularly, when a reactor is exposed out of a problem, whether the catalyst is deactivated cannot be eliminated in the first time, secondly, the method has high cost, the method needs to consume higher time cost and direct cost, the cost of single sampling detection can reach tens of thousands yuan, the whole monitoring period is about one month, and the accumulated cost forms a larger burden on the user. Therefore, how to evaluate the service life of the denitration catalyst efficiently and rapidly becomes a problem to be solved urgently. Disclosure of Invention The present disclosure provides a denitration catalyst lifetime assessment method, device, equipment and storage medium. According to a first aspect of the present disclosure, a denitration catalyst lifetime assessment method is provided. The method comprises the following steps: Acquiring current operation parameters of a denitration system; Correcting the flow of the flue gas entering the denitration system according to the current operation parameters of the denitration system to obtain corrected flow of the flue gas; Calculating the surface speed of a denitration catalyst of the denitration system according to the corrected flue gas flow; calculating the dynamic decay time of the denitration catalyst in unit time according to the surface speed; And evaluating the service life of the denitration catalyst according to the dynamic decay time in the unit time. In the aspect and any possible implementation manner described above, there is further provided an implementation manner, which evaluates the service life of the denitration catalyst according to the dynamic decay time in the unit time, including: Calculating denitration efficiency of the denitration system under different working conditions and at different running times; Calculating theoretical activity values under different working conditions according to the denitration efficiency of the denitration system under different working conditions and different running times; calculating theoretical decay time under different working conditions according to the theoretical activity values under different working conditions; and evaluating the service life of the denitration catalyst according to the dynamic decay time in the unit time and the theoretical decay time under different working conditions. In the aspect and any possible implementation manner described above, there is further provided an implementation manner, where the calculating the denitration efficiency of the denitration system in different running times under different working conditions includes: acquiring the operation load and the operation temperature of the denitration system in different operation time under different working conditions; acquiring a preset theoretical denitration efficiency formula; According to the preset theoretical denitration efficiency formula and the operation loads and the operation temperatures of the denitration system under different working conditions and at different operation times, calculating the denitration efficiency of the denitration system under different working conditions and at different operation times; According to the denitration efficiency of the denitration system under different working conditions and different running time, calculating theoretical activity values under different working conditions comprises the following steps: and calculating theoretical activity values under different working conditions according to the denitration efficiency, the ammonia escape preset value, the nitrogen oxide concentration at the inlet of the denitration system and the surface speed of the denitration catalyst of the denitration system under different working conditions in different running times. In the aspect and any possible implementation manner as described above, there is further provided an implementation manner, where the preset theoretical den