CN-121971924-A - Multi-chamber airflow load balancing and intelligent collaborative ash removal control system for large-sized bag type dust collector

CN121971924ACN 121971924 ACN121971924 ACN 121971924ACN-121971924-A

Abstract

The invention discloses a multi-chamber airflow load balancing and intelligent collaborative ash removal control system of a large-scale bag type dust remover, and particularly relates to the technical field of collaborative ash removal of dust removers; the method comprises the steps of calculating the current average value of the real-time differential pressure of all filter chambers, respectively adjusting the opening of the corresponding electric valve according to the deviation degree of the differential pressure of each chamber and the current average value to enable the differential pressure of each chamber to approach to the average value, calculating the differential pressure change rate according to the real-time differential pressure of each chamber, respectively adjusting the spraying interval of the pulse valve of the corresponding filter chamber according to the differential pressure change rate, continuously collecting dust concentration at the total outlet of the dust remover, recording the action moment of the pulse valve of each filter chamber, extracting the fluctuation characteristic of the dust concentration in a preset time window after the pulse action, and identifying the filter chamber as a bag breaking suspected unit if the preset bag breaking judging condition is met, thereby solving the technical problems of uneven load of each chamber, rough ash cleaning strategy and difficult bag breaking positioning of the existing dust remover.

Inventors

SUN LI
QIAN TING
QIAN TIANYI
ZHAO HAIXIN
JIA RUIWEN

Assignees

洁华控股股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260311

Claims (10)

1. Large-scale bag collector multichamber air current load balance and intelligent collaborative deashing control system, the dust remover contains a plurality of filter chambers, and every filter chamber is equipped with air inlet branch pipe, net gas export and pulse valve, its characterized in that includes: the chamber monitoring and regulating module is used for installing an electric valve on an air inlet branch pipe of each filtering chamber, installing a differential pressure transmitter on a clean air outlet of each filtering chamber and continuously collecting real-time differential pressure of the corresponding filtering chamber; The load balancing distribution module calculates the current average value of the real-time differential pressure of all the filter chambers, and respectively adjusts the opening of the electric valve on the air inlet branch pipe of the corresponding filter chamber according to the deviation degree of the real-time differential pressure of each filter chamber from the current average value, so that the real-time differential pressure of each filter chamber approaches to the current average value; The ash removal parameter optimization module calculates the differential pressure change rate of each filtering chamber according to the real-time differential pressure of the filtering chamber, respectively adjusts the spraying interval of the pulse valve of the corresponding filtering chamber according to the differential pressure change rate, shortens the spraying interval when the differential pressure change rate is increased, and prolongs the spraying interval when the differential pressure change rate is reduced; And the bag breaking diagnosis positioning module is used for continuously collecting dust concentration at the main outlet of the dust remover, recording each action moment of each filter chamber pulse valve, extracting dust concentration fluctuation characteristics in a preset time window after the action moment after the action of the pulse valve of a certain filter chamber, and identifying the filter chamber as a bag breaking suspected unit if the dust concentration fluctuation characteristics meet preset bag breaking judgment conditions.
2. The multi-chamber airflow load balancing and intelligent collaborative ash cleaning control system of the large-scale bag type dust collector according to claim 1 is characterized in that in the load balancing distribution module, real-time differential pressure of all filter chambers is read in a fixed scanning period, a current average value is calculated, when the real-time differential pressure of a certain filter chamber is larger than the current average value and the difference between the real-time differential pressure and the current average value exceeds a first preset dead zone range, the opening of an electric valve on an air inlet branch pipe of the filter chamber is reduced, when the real-time differential pressure of the certain filter chamber is smaller than the current average value and the difference between the real-time differential pressure and the current average value exceeds a second preset dead zone range, the opening of the electric valve on the air inlet branch pipe of the filter chamber is increased, the adjusting amplitude adopted by the opening is positively correlated with the degree of deviation of the real-time differential pressure of the filter chamber from the current average value, and the single adjusting amplitude is larger when the deviation degree is larger.
3. The multi-chamber airflow load balancing and intelligent collaborative ash removal control system of a large-scale bag-type dust collector according to claim 1, wherein after the opening of an electric valve is adjusted, the actual opening feedback value of the electric valve is continuously read, the actual opening feedback value is compared with an output opening instruction value, and a valve adjustment failure alarm is generated when the deviation of the actual opening feedback value and the output opening instruction value continuously exceeds a preset deviation threshold value.
4. The multi-chamber airflow load balancing and intelligent collaborative ash removal control system of a large bag type dust collector according to claim 1 is characterized in that in an ash removal parameter optimization module, the differential pressure change rate is obtained by taking a sliding time window as a unit, performing linear fitting on the real-time differential pressure of each filter chamber in the window, taking the slope obtained by fitting as the differential pressure change rate of the filter chamber at the window end time, respectively adjusting the injection interval of a pulse valve of the corresponding filter chamber according to the differential pressure change rate, namely comparing the differential pressure change rate with a preset reference change rate threshold, proportionally shortening the injection interval when the differential pressure change rate is larger than the reference change rate threshold, and proportionally extending the injection interval when the differential pressure change rate is smaller than the reference change rate threshold, and adjusting the injection duration of the pulse valve of the filter chamber according to the ratio of the real-time differential pressure of each filter chamber to the current average value of all the differential pressures of the dust collector, when the real-time differential pressure of each filter chamber is higher than the current average value, and shortening the injection duration when the real-time differential pressure is lower than the current average value.
5. The multi-chamber airflow load balancing and intelligent collaborative ash removal control system of the large bag-type dust collector according to claim 1 is characterized in that in a bag breaking diagnosis positioning module, dust concentration fluctuation characteristics in a preset time window after the action moment are extracted, specifically comprising the steps of calculating average concentration in a preset time period before the action moment as background concentration, obtaining concentration peaks in the preset time window, calculating the proportion of the difference value of the concentration peaks and the background concentration to the background concentration as a normalized peak value ratio, and generating a single abnormal score corresponding to the pulse according to the normalized peak value ratio, the time offset of the concentration peaks and the gradient of a concentration rising stage.
6. The multi-chamber airflow load balancing and intelligent collaborative ash removal control system of the large-scale bag type dust collector according to claim 5 is characterized in that a bag breaking judgment condition preset by the bag breaking diagnosis positioning module is that an accumulated abnormality index obtained by carrying out index weighted moving average on single abnormality scores corresponding to the same filtering chamber continuously for a plurality of times exceeds a preset alarm threshold value, after the filtering chamber is identified as a bag breaking suspected unit, the control system automatically invokes historical pulse action data of the filtering chamber to carry out comparison verification with historical dust concentration fluctuation data, and after verification is passed, the filtering chamber is identified at a human-computer interaction interface and bag breaking early warning is sent.
7. The multi-chamber airflow load balancing and intelligent collaborative ash removal control system of the large-scale bag type dust collector according to claim 1 is characterized in that before the ash removal parameter optimization module adjusts the injection interval of the pulse valve of the corresponding filter chamber respectively according to the differential pressure change rate, the system further comprises a filter bag life attenuation trend index of the filter chamber, wherein the filter bag life attenuation trend index is used for representing a dimensionless value of the accumulated damage degree of the filter bag in the filter chamber in the operation process, the filter bag life attenuation trend index is obtained by weighting and fusing the filter bag life attenuation trend index after normalization according to the accumulated pulse impact equivalent, the accumulated thermal load equivalent and the accumulated differential pressure overload equivalent of the filter chamber, after the basic injection interval is calculated according to the differential pressure change rate, the basic injection interval is reversely restrained and corrected according to the filter bag life attenuation trend index, when the filter bag life attenuation trend index is increased, the actually executed injection interval is prolonged according to the positive correlation proportion, and ash removal frequency of the filter bag in the later life is reduced.
8. The multi-chamber airflow load balancing and intelligent collaborative ash cleaning control system of the large-scale bag type dust collector according to claim 7 is characterized in that the accumulated pulse impact equivalent obtaining mode is that the product of the duration time of each pulse valve injection of the filter chamber and the compressed air supply pressure at the time of the injection is accumulated and summed, the accumulated heat load equivalent obtaining mode is that the difference value of the real-time smoke temperature of the filter chamber exceeding the design tolerance temperature upper limit of the filter bag is integrated in the whole running time, the accumulated differential pressure overload equivalent obtaining mode is that the difference value of the real-time differential pressure of the filter chamber exceeding the design allowable maximum differential pressure is integrated in the whole running time, the three equivalent values are divided by the respective design life upper limit equivalent to obtain normalized components, and the normalized components are multiplied by preset weight coefficients and added to obtain the filter bag life attenuation trend index.
9. The multi-chamber airflow load balancing and intelligent collaborative ash removal control system of the large bag type dust collector according to claim 1 is characterized by further comprising filter bag interface micro-leakage compensation judgment before the filter chamber is identified as a bag breaking suspected unit in the bag breaking diagnosis positioning module, wherein an annular micro-pressure sensor is arranged below a pattern plate of each filter chamber and at the periphery of an interface between the filter bag and the pattern plate, or a vibration displacement sensor is arranged at the joint of a pulse valve blowing pipe and the pattern plate, and a transient pressure fluctuation curve at the interface output by the annular micro-pressure sensor or a vibration displacement curve output by the vibration displacement sensor is synchronously acquired while the action moment of the pulse valve is recorded in the bag breaking diagnosis positioning module.
10. The multi-chamber airflow load balancing and intelligent collaborative ash removal control system of the large bag type dust collector according to claim 9 is characterized in that the collected transient pressure fluctuation curve or vibration displacement curve is compared with a pre-stored standard characteristic waveform of the interface in a normal sealing state, if the difference between the transient pressure fluctuation curve or vibration displacement curve and the standard characteristic waveform exceeds a preset waveform similarity threshold value, micro leakage is judged to exist on the interface, the interface is marked as a leakage suspected point, and when a bag breaking suspected unit is identified according to dust concentration fluctuation characteristics in a bag breaking diagnosis positioning module, a filter chamber corresponding to the leakage suspected point is removed from a current bag breaking judging process, or is singly classified into a sealing failure category and an interface fastening maintenance prompt is generated.

Description

Multi-chamber airflow load balancing and intelligent collaborative ash removal control system for large-sized bag type dust collector Technical Field The invention relates to the technical field of collaborative ash removal of dust collectors, in particular to a multi-chamber airflow load balancing and intelligent collaborative ash removal control system of a large-sized bag-type dust collector. Background The large bag type dust collector is a key device for industrial flue gas purification and is widely applied to high energy consumption industries such as electric power, steel, cement and the like. With the implementation of ultra-low emission standards, the dust removing equipment tends to be large in size, the amount of smoke processed by a single equipment can reach millions of cubic meters per hour, the interior of the dust removing equipment contains tens to hundreds of filter chambers, and each filter chamber is provided with hundreds of filter bags. In actual operation, each filter chamber depends on the pulse blowing ash removal system to maintain the performance of the filter bag, and the cooperative working state of the filter chamber influences the discharge concentration, the equipment energy consumption and the service life of the filter bag. At present, the large-scale bag type dust collector mostly adopts the total air inlet pipe to divide the air inlet mode, is limited by the on-the-spot space and the pipeline trend, and the length of each filter chamber air inlet branch pipe, elbow quantity are different, lead to the deviation design value of air inlet quantity. This will make the dust accumulation of the filter bag of the filter chamber with large air intake fast, the resistance rises fast, and it is easy to become the broken starting point of the filter bag. Meanwhile, the ash removal control is mainly based on timing or constant pressure difference, the load difference of each filter chamber is not considered, ash removal with heavy load is insufficient, ash removal with light load is excessive, resources are wasted, and damage of the filter bag is accelerated. In addition, when the filter bag is damaged, the existing dust remover is only provided with a monitor at the main outlet, a damaged filter chamber cannot be positioned, operation and maintenance personnel need to check the filter chamber by chamber, the time is long, and the exceeding discharge period is continuous. In summary, the existing large-scale bag type dust collector has the problems that the load of each filtering chamber is uneven, the control strategy cannot be dynamically adjusted, a rapid positioning bag breaking means is lacked, and the like, so that air flow distribution, ash removal control and fault diagnosis are split, the intelligent and fine development of equipment is restricted, and a systematic solution is urgently needed. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides a multi-chamber airflow load balancing and intelligent collaborative ash removal control system of a large-sized bag type dust collector, wherein the air flow balancing is realized by independently monitoring real-time differential pressure in separate chambers and dynamically adjusting an air inlet valve, ash removal parameters are independently adjusted by the differential pressure change rate of each chamber to realize ash removal on demand, and the bag breaking accurate positioning is realized by the association analysis of the fluctuation characteristics of the total outlet dust concentration after pulse action, so as to solve the problems in the background art. In order to achieve the purpose, the invention provides the technical scheme that the multi-chamber airflow load balancing and intelligent collaborative ash removal control system of the large-sized bag type dust remover comprises a plurality of filter chambers, each filter chamber is provided with an air inlet branch pipe, a clean air outlet and a pulse valve, and the system comprises: the sub-chamber monitoring regulation module is used for acquiring real-time differential pressure data of each filtering chamber, installing an electric valve on an air inlet branch pipe of each filtering chamber, installing a differential pressure transmitter on a clean air outlet of each filtering chamber, and continuously acquiring real-time differential pressure of the corresponding filtering chamber; the load balancing distribution module is used for generating an opening adjustment instruction of the electric valve, calculating the current average value of the real-time differential pressure of all the filter chambers, and respectively adjusting the opening of the electric valve on the air inlet branch pipe of the corresponding filter chamber according to the deviation degree of the real-time differential pressure of each filter chamber and the current average value so that the real-time differential pressure of each filter chamber appr